shay murtag precast beams

Prestressed Concrete Beams

Technical ManualEdition 2

Contents

Table of Contents:

Introduction

U-Beam pg 1-5

MY-Beam pg 6-8

MYE-Beam pg 9-11

Y-Beam pg 12-14

YE-Beam pg 15-17

T-Beam pg 18-20

TY-Beam pg 21-23

TYE-Beam pg 24-26

M-Beam pg 27-29

UM-Beam pg 30-32

Box-Beam pg 33-35

W-Beam pg 36-38

Bridge Designers Checklist/Design Notes pg 40-41

Interactive Table of Contents. Click a title to go directly to that section.Return to the Table of Contents by clicking on the page again.

Contents

970

80

0 -

16

00

Typical applications:Medium and long span bridges.

Advantages:Provides a ready made edge detail.Provides easy provision for services.Suitable for skewed deck which experience high torsion.

pg 1-5U-Beam

Span Range (in metres) 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

970

30

0 -

60

0

Typical applications:Short and Medium span bridges and commercial developments eg. railway under bridge.

Advantages:Provides a closely assembled soffit.No need for formwork.Ideal for short to medium spans that require rapid construction.

pg 6-8MY-Beam


970

30

0 -

60

0

Typical applications:Complimentary edge beam to the MY Beam.

Advantages:The increased section properties can be used for a solid infill deck to support parpet loading.Accomodate the installation of precast parapets to solid infill decks.

pg 9-11MYE-Beam


750

70

0 -

14

00

Typical applications:Medium and long span bridges andcommercial development.

Advantages:There is easy access to the undersideof the structure, as the beams are spaced apart.

pg 12-14Y-Beam


750

70

0 -

14

00

Typical applications:This is a complimentary edge beamto the ‘Y’ beam.

Advantages:The YE beam offers increased section properties to support parpet loading.Can be used for either a solid infill deck or beam and slab construction.

pg 15-17YE-Beam


Contents

495

38

0 -

81

5

Typical applications:Short and medium span bridges andcommercial developments.

Advantages:Design provides for a closely assembled soffit.There is no need for formwork.

pg 18-20T-Beam


750

40

0 -

90

0

Typical applications:Short and medium span bridges,commercial developments, jetties and marine decks.

Advantages:Provides a closely assembled soffit and there is less insitu concrete.No need for formwork.

pg 21-23TY-Beam (available with rebate)


970

72

0 -

13

60

Typical applications:Provides voided bridge deck for medium and long spanroad bridge construction.

Advantages:Closed soffit to underside ideal for pseudo-boxtype construction.

pg 27-29M-Beam


970

72

0 -

13

60

Typical applications:Complimentary edge beam to the ‘M’ beam.

Advantages:Provides a clean vertical face with a variety of finishesalong with a channel void for incorporation of services.

pg 30-32UM-Beam


750

40

0 -

90

0

Typical applications:This beam is a complimentary edge beam to the ‘TY’ beam.

Advantages:Can be used for a solid infill deck. The TYE beam offers increasedsection properties to support parpet loading.

pg 24-26TYE-Beam (available with rebate)

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38Span Range (in metres)

1510

80

0 -

23

00

Typical applications:Medium and long span bridges.

Advantages:Provides a ready made edge detail.Provides easy provision for services.Suitable for skewed deck which experience high torsion.

pg 36-38W-Beam

Span Range

(in metres)

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 38 39 40 41 42

Bridge Designers Checklist/Design Notes pg 40-41

495/750/970

70

0 -

80

0

Typical applications:Short to medium span bridges.Ideal for use over busy railway lines.

Advantages:Provides a quick, safeworking platform.

pg 33-35Box-Beam


Contents

Introduction

For over forty years Shay Murtagh Precast has been to the forefront ofthe civil engineering industry. We are industry specialists in the design andmanufacture of precast pre-stressed concrete products and our productinclusions are to Utility, Rail, Infrastructure and Commercial markets.

We believe our business is bespoke. We value each project individually. Our working partners demand the highest quality in product, reliability in service and confidence in team. All of which we deliver categorically. That successful basis has led us to work on a wide range of projects throughout the UK and Ireland with leading Main Contractors and Clients.

This is Edition Two of our Technical Manual for Pre-Stressed Concrete Beams. The first editiongave you a basis to some of our product solutions. This second edition incorporates more detail in response to suggestions from you the users, namely greater detail of the cross sectional dimensions and available strand locations for most beam types and the addition of span tables for Box Beams and W Beams. The popular Bridge Designers checklist has also been expanded to include more information on bridge bearings, concrete grade, the design assumptions used as the basis for the span tables and a new section on rail applications. This is working tool which in conjunction with our technical team can bring value engineering solutions to your project.

Contact us on: [email protected] or Tel: 0844 202 0263

Full listing of Bridge Beams:

T-BeamsTY-BeamsMYE-Beams

MY-BeamsY-BeamsM-Beams

UM-BeamsU-BeamsYE-Beams

TYE-BeamsW BeamsBox Beams

1www.shaymurtagh.co.uk

TECHNICAL MANUAL

25

25

2525

40 245 40

360

165

270

210

40 245 40

970

920

16

0

25 3

0

Yc

x x

Y

Y

D

L1

L2

U-Beam properties Shay Murtagh Precast Height ofcentroidabovesoffitType Depth

D

U1 800 479470 353.4 68.2 86.19 30.459 11.99 1195 520

U3 900 510460 398.4 84.39 106.27 42.335 12.76 1280 558

U5 1000 543840 444.8 102.49 127.91 56.898 13.60 1236 586

U7 1100 577220 491.7 121.93 150.83 74.168 14.43 1264 614

U8 1200 610600 539 142.68 174.99 94.315 15.27 1292 642

U9 1300 643980 586.5 164.69 200.36 117.51 16.10 1320 670

U10 1400 677360 634.3 187.93 226.9 143.91 16.93 1348 698

U11 1500 710740 682.2 212.4 254.6 173.69 17.77 1376 726

U12 1600 744120 730.4 238.07 283.45 207.03 18.60 1404 754

A

(kN/m)

L1 L2Yc Z t

mm 2

(mm x 10 )3 6

(mm)(mm)(mm) (mm)(mm x 10 )4 9

(mm x 10 )3 6

Zb I xx

Area Section ModulusSecond Moment

of Area Self weight/mTop of beamdimensions

U3 to U12 Beam Section Properties

U-Beam MY-Beam MYE-Beam Y-Beam YE-Beam T-Beam TY-Beam TYE-Beam M-Beam UM-Beam Box-Beam W-Beam Design Notes

TECHNICAL MANUAL

U1

Metres 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

U3

U5

U7

U8

U9

U10

U11

U12

Blue = 2.0mc/c Yellow = 3.0mc/c *See Design Notes For Loading Assumptions pg 40-41Red = 2.5mc/c

U-Beam Span Table Shay Murtagh Precast

2 UK Tel: 0844 202 0263 UK Fax: 0844 888 5263 Email: [email protected]

U1 Beam Section Properties

x x

Y

Y

40

25

80

0

Yc

25

16

0

25

25

22525

363

32

L1

L2 225

210

274

166

2525 920

4025

30


TECHNICAL MANUAL

U-Beam Typical Details Shay Murtagh Precast

SPAN 12M TO 35.5M

Typical Arrangement of DeckSection with Cantilever

U12@1600mmU11@1500mmU10@1400mmU9@1300mmU8@1200mmU7@1100mmU5@1000mmU3@900mmU1@800mm

200mm typical

Bridge Parapet Upstand

1500mm to 3000mmcentres

Insitu slabC32/40typically

25mm G.R.C.or 75mm permanent

formwork



TECHNICAL MANUAL

U7 - Typical Anchorage of Lifting Hooks

90

60

45

15

60

20

Typical Section Through Bridge

PrestressedConcreteU-Beam

Threaded BarCast intoU-Beam

G.R.C.or75mmpermanentformworkpanels

1 No. 120 widex 120 deep

holes throughwebs at

abutment & pier ends270mm to centrelinefrom soffit







50mm Min. Bearing

Precast ConcreteCantilever Units200mm

InsituConcreteDeck Slab

100 x 60 RHSPrecast ConcreteCantilever Units

20

Precast ConcreteCantilevers Detail

Typical Section

InsituConcreteStitch

50mm Min. Bearing

100 x 60 RHS

200mm InsituConcrete DeckSlab

Threaded BarCast intoU-Beam

PrestressedConcreteBeam

Single crane liftingfor lifting both ends

Tandum crane liftingfor lifting both ends

Superstrandto be used for lifting

Superstrand tobe used for lifting

D-shackle to beused when liftingon siteCrosby shackle screw pin-209Nominal size 50mmWorking load limit=35 tonnes

Tandum crane lifting

Single crane lifting

Lift

ing

Slin

g

Lift

ing

Slin

g

11

00

91

5821

614

325 325

U7 SectionShowing Dwarf Wall

50mm Min. Bearing




TECHNICAL MANUAL

Typical Arrangement of Deck Section with Cantilever

1500 to 3000

centres

200mm typical

200mm typical

Permanent Formwork

insitu slab C32/40 typically

Typical Arrangement of Deck Section with Cantilever(Increase in Formwork Depth)

Standard Section of PossibleReinforcement for U7 Beam

1500 to 3000mm

75

centres


IncreasedFormworkThicknessBetweenBeams as

centres increase


U-Beam Possible Strand Positions


25

if F

orm

wo

rk s

pan

1

m7

5 if

Fo

rmw

ork

sp

an

1m

40 245 40

970

30

36

08

25

16

00

15

0

50

4 @ 1530

4 @ 1380

2 @ 1280 2 @ 12602 @ 1180

2 @ 11302 @ 1080

2 @ 10302 @ 980

2 @ 9302 @ 880

2 @ 8302 @ 780

2 @ 7302 @ 680

2 @ 6302 @ 580

2 @ 5302 @ 480

2 @ 340

2 @ 430

8 @ 21010 @ 16018 @ 11018 @ 60


7

TECHNICAL MANUAL

MY-Beam properties Shay Murtagh PrecastHeight ofcentroidabovesoffit

Distance tocentroid

from edgeof flangeType Depth

(mm)

D

MY1 300 170000 111.7 485 6.39 10.78 1.2033 4.25 360

MY2 350 188500 132.6 485 9.05 14.84 1.9681 4.71 380

MY3 400 208000 155.4 485 12.31 19.39 3.0123 5.20 400

MY4 450 228500 179.6 485 16.18 24.37 4.3753 5.71 420

MY5 500 250000 205 485 20.67 29.74 6.0972 6.25 440

MY6 550 272000 230.9 485 25.61 35.4 8.1425 6.80 440

MY7 600 294000 256.6 485 30.83 41.26 10.587 7.35 440

A

(kN/m)

WfYc Xc

mm 2

(mm x 10 ) (mm)(mm)(mm)3 6

(mm x 10 )3 6

(mm x 10 )4 9

Z1 Zb l xx

Area Section Modulus

SecondMomentof Area Self weight/m

Top of beamdimensions

485

125

970

30025

400

75

25

Y

xx

Y

YcWf

970

102 102

920

60

0

57 45 45 57

3 No @ 5503 No @ 5003 No @ 4503 No @ 4003 No @ 3503 No @ 3001 No @ 250

5 No @ 10517 No @ 60

Typical link arrangement and possible strand positions



SPAN 4M TO 19M

Cast in Services

Parapet unitwith variousformlinerfinishes available

Stone/brick finishcan be applied toinside face on request

Edge Beam & parapetbatched together in factory

985mm centres(typical)Insitu Concrete

Site Pour

TECHNICAL MANUAL

Typical MY deck section with parapets*Individual MY Beam Flanges can becurtailed to suit deck widths

MY7@600mmMY6@550mmMY5@500mmMY4@450mmMY3@400mmMY2@350mmMY1@300mm

MY1

Metres

MY2

MY3

MY4

MY5

MY6

MY7

Beams placed individually Beams batched and placed in pairs/triples *See Design Notes For Loading Assumptions pg 40-41

MY-Beam Span Table Shay Murtagh Precast 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19



TECHNICAL MANUAL

Typical Anchorage of Lifting Hooks

Parpet to MY Beam Detail MY-Beam batched in pairs

Standard Batched MY Beam to MY Beam Detail

Standard section of

Typical Shear Reinforcement

for MY3 beam

Standard MY3

Beam Section

Typical Deck Section with Parapets Part Elevation

970

920

400

40

0

700 700

200

300

340

Ducted Services

Standard OPE spaced at 700mm c/cfor transverse reinforcement

Formliner Finish available tooutside of parapet faces

Finish tooutside ofparapet facesavailable

Stone/Brick cladding finishavailable to inside face

Ducted Services

Edge Beam &Parapet unitbatched togetherin factory

The width of the beam flangesmay be reduced to suit the

overall deck width

BIO Typical

In-SituConcrete Stitch

C32/40on site

MY-Beam Typical Details Shay Murtagh Precast

Strands to besplayed in beamto provideanchorage

D-shackle to beused when liftingon site“Crosby” shackle, screw Pin-209Nominal size 50mmWorking load limit-35 tonnes

Crane Lifting

Site Lifting

Formliner Finish availableto external face

Stone/Brickcladding finishavailable toinside face


Lift

ing

Slin

g

Liftin

g Sli

ng

Tandum Crane Lifting

Single Crane Lifting

90

45

15

665

60


TECHNICAL MANUAL

MYE-Beam properties Shay Murtagh PrecastHeight ofcentroidabovesoffit

Distance tocentroid

fromvertical faceType Depth

(mm)

D

MYE1 300 230200 136.0 399.1 10.77 12.99 1.7667 5.76 665

MYE2 350 263700 160.0 391.0 14.84 17.61 2.8186 6.59 675

MYE3 400 297700 184.6 385.2 19.58 22.85 4.2180 7.44 685

MYE4 450 332200 209.6 381.0 25.01 28.69 6.0128 8.31 695

MYE5 500 367200 234.9 378.0 31.12 35.13 8.2517 9.18 705

MYE6 550 402400 260.3 375.8 37.85 42.13 10.9660 10.06 705

MYE7 600 437700 285.6 373.9 42.12 49.65 14.1830 10.94 705

A

(kN/m)

WfYc Xc

mm 2

(mm x 10 ) (mm)(mm)(mm)3 6

(mm x 10 )3 6

(mm x 10 )4 9

Z1 Zb l xx


SecondMomentof Area Self weight/m

Top of beamdimensions

Yc

Xc970

635

400 max

75

25

25

Y

Y

xx

Wf6

00

920970

102 102 102 102 1026 No @ 5506 No @ 5006 No @ 4506 No @ 4006 No @ 3506 No @ 3005 No @ 250

11 No @ 10517 No @ 60

Typical link arrangement and possible strand positions



TECHNICAL MANUAL

Typical MY & MYE Deck Section

SPAN 4m TO 19m

125mmtypical


MYE7@600mmMYE6@550mmMYE5@500mmMYE4@450mmMYE3@400mmMYE2@350mmMYE1@300mm

MYE1

Metres

MYE2

MYE3

MYE4

MYE5

MYE6

MYE7

MYE-Beam Span Table Shay Murtagh Precast

Beams placed individually Beams batched and placed in pairs/triples *See Design Notes For Loading Assumptions pg 40-41

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19



TECHNICAL MANUAL

125mmtypical

700

40

0

25

01

25

25

25

25

75

25

2525

20290

3

285 685

970

700

200

infill slab C32/40 typically

Part Elevation (MYE Beam)

Typical Shear Links & Transverse

couplers/bars for MYE Beam

Standard MYE3

Beam Section

Couplers/BarsSpaced at 700mm c/c

Site Lifting

D-Shackle to beused when liftingon site“Crosby” Shackle, Screw Pin-209Nominal Size 50mmWorking Load Limit = 35 Tonnes

SuperstrandTo be used for lifting

Lift

ing

Slin

g

Liftin

g Sli

ng



90

45

15

665

60

Typical MY & MYE Deck Section (Deck slab & infill concrete)


MYE-Beam Typical Details Shay Murtagh Precast

B10 Typical

Couplers/Barsspaced at 700mm c/c



TECHNICAL MANUAL

Y-Beam properties Shay Murtagh Precast Height ofcentroidabovesoffitType Depth

(mm x 10 )

D

Y1 700 310140 255 24.88 43.42 11.073 7.75 198

Y2 800 340830 298.4 35.07 58.96 17.593 8.52 227

Y3 900 374420 346.8 47.95 76.51 26.53 9.36 256

Y4 1000 410880 399.3 63.63 95.72 38.22 10.27 285

Y5 1100 450230 455.2 82.19 116.4 52.99 11.26 313

Y6 1200 492460 514 103.73 138.45 71.16 12.31 342

Y7 1300 537580 575 128.35 161.83 93.052 13.44 371

Y8 1400 585580 637.8 156.12 186.56 118.99 14.64 400

A

(kN/m)

WfYc Z t

3 mm

2 6(mm x 10 ) (mm)(mm)(mm)

3 6(mm x 10 )

4 9

Zb I xx

Area Section ModulusSecond Moment

of Area Self weight/mTop of beamdimensions

WfWf

Y8 @ 1400 mmY7 @ 1300 mmY6 @ 1200 mmY5 @ 1100 mmY4 @ 1000 mmY3 @ 900 mmY2 @ 800 mmY1 @ 700 mm

Y8 Wf = 400 mmY7 Wf = 371 mmY6 Wf = 342 mmY5 Wf = 313 mmY4 Wf = 285 mmY3 Wf = 256 mmY2 Wf = 227 mmY1 Wf = 198 mmx x

Y

Y

Yc

50

50

40 40

750 750

Y-Beam Section Properties



TECHNICAL MANUAL

SPAN 12M TO 31M

Typical Deck Section

Y8@1400mm

Y7@1300mm

Y6@1200mm

Y5@1100mm

Y4@1000mm

Y3@900mm

Y2@800mm

Y1@700mm

See Span Tableabove centres1000-2000mm

Insitu slab C32/40 typically200mmtypical

Y1

Metres

Y2

Y3

Y4

Y5

Y6

Y7

Y8

Blue = 1.0mc/c Red = 2mc/c

Y-Beam Span Table Shay Murtagh Precast

*See Design Notes For Loading Assumptions pg 40-41

3211 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31


25mm G.R.C.permanent formworkif Formwork span 1m;75mm permanent Formworkif Formwork span 1m


TECHNICAL MANUAL

centres

25 x 25 chamfers

50x50RebateTypical

insitu slab C32/40typically

Permanent Formwork(G.R.C. or Precast Concrete) Scabbled Finish

to beam end

200mm typical

Typical Deck Section Part Elevation (Beam End)

Standard Y6Beam Section

Standard Section ofTypical Shear Reinforcement

for Y6 Beam

Typical Strand Layoutfor Y6 Beam

50

71

0

12

00

12

00

10

0

400 min

16

0

11

0

60

10

00

10

0

R100R100

17

52

51

40

50

5

160

700

25 25

50320

100 50 50 75 50 5050 50 75 50 50 100


D-Shackle to beused when liftingonm site‘Crosby’ shackle, screw Pin-209Nominal Size 50mmWorking Load Limit=35 Tonnes

Strands to besplayed in beamto provideanchorage



90

60

60

15

45

60

Tandum Crane Lifting Single Crane Lifting

Lift

ing

Slin

g

Liftin

g Sli

ng

Y-Beam Typical Details Shay Murtagh Precast

See Y-Beam Span Tablepage 13 for centres



TECHNICAL MANUAL

YE-Beam properties Shay Murtagh Precast Height ofcentroidabovesoffit

Distance tocentroid

fromvertical faceType Depth

(mm)

D

YE1 700 417260 315 309.5 44.43 54.31 17.106 10.43 434

YE2 800 470100 383.4 304.4 59.28 71.21 25.879 11.75 448

YE3 900 524400 413.4 300.9 76.61 90.18 37.278 13.11 463

YE4 1000 580130 464.6 298.7 96.45 111.15 51.641 14.50 477

YE5 1100 637300 518.8 297.5 118.85 134.13 69.318 15.93 492

YE6 1200 695920 569.8 297.1 143.36 159.1 90.659 17.40 506

YE7 1300 755880 623.6 297.3 171.55 186.08 116.04 18.90 521

YE8 1400 817480 678 298 201.98 215.1 145.83 20.44 535

A

(kN/m)

WfYc Xc

mm 2

(mm x 10 ) (mm)(mm)(mm)3 6

(mm x 10 )3 6

(mm x 10 )4 9

Z t Zb

Area

SecondMomentof Area Self weight/mSection Modulus

Top of Flange

YE8 @ 1400 mm

YE7 @ 1300 mm

YE6 @ 1200 mm

YE5 @ 1100 mm

YE4 @ 1000 mm

YE3 @ 900 mm

YE2 @ 800 mm

YE1 @ 700 mm

YE8 Wf = 535 mm

YE7 Wf = 521 mm

YE6 Wf = 506 mm

YE5 Wf = 492 mm

YE4 Wf = 477 mm

YE3 Wf = 463 mm

YE2 Wf = 448 mm

YE1 Wf = 434 mm x x

Y

Y

Yc

Xc

Wf Wf50

5050

25 25

700


U-Beam MY-Beam MYE-Beam Y-Beam YE-Beam T-Beam TY-Beam TYE-Beam M-Beam UM-Beam Box-Beam W-Beam Design Notes U-Beam MY-Beam MYE-Beam Y-Beam YE-Beam T-Beam TY-Beam TYE-Beam M-Beam UM-Beam Box-Beam W-Beam Design Notes

TECHNICAL MANUAL

SPAN 12M TO 31M

Typical Deck Arrangement

YE8@1400mm

YE7@1300mm

YE6@1200mm

YE5@1100mm

YE4@1000mm

YE3@900mm

YE2@800mm

YE1@700mm

See Span Tableabove for centres

Insitu slab C32/40 typically200mmtypical

Bridge Parapet

YE1

Metres

YE2

YE3

YE4

YE5

YE6

YE7

YE8

Blue = 1.0mc/c Red = 2mc/c

YE-Beam Span Table Shay Murtagh Precast


11 323130292827262524232221201918171615141312


25mm G.R.C.permanent formworkif Formwork span 1m;75mm permanent Formworkif Formwork span 1m


TECHNICAL MANUAL


Permanent Formwork(G.R.C. or Precast Concretedepending on beam centres)

centres(See Span Table)

insitu slab C32/40 typically200mm typical


Standard Section of

Typical Shear reinforcement

for YE6 BeamStandard YE6

Beam Section

Typical Strand Layout

for YE6 Beam

53550

12

00

90

60

60

15

45

60

50

25

25 25

700

17

51

40

71

0

5

165

R100

85

25

Tandum Crane LiftingD-Shackle to beused when liftingon site‘Crosby’ shackle, screw Pin-209Nominal Size 50mmWorking Load Limit=35 Tonnes



Lift

ing

Slin

g

Liftin

g Sli

ng

12

00

21

0

16

01

10

60

10

01

00

100 50 50 75 50 5050 50 75 50 50 100

90

0

50x50RebateTypical

Rebateavailable onexternalface

YE Beam Typical Details Shay Murtagh Precast

BridgeParapet



TECHNICAL MANUAL

T-Beam properties Shay Murtagh Precast Height ofcentroidabovesoffit

Locationof Centroid

frombeam edgeType Depth

D

T1 380 97385 139.2 247.5 5.11 8.84 1.2306 2.43

T2 420 105580 159.4 247.5 6.70 10.95 1.7462 2.64

T3 535 114160 196.1 247.5 9.57 16.35 3.2426 2.85

T4 575 122360 220.2 247.5 11.92 19.21 4.2290 3.06

T5 615 130560 243.7 247.5 14.30 21.79 5.3098 3.26

T6 655 138760 266.8 247.5 16.73 24.33 6.4921 3.47

T7 695 146960 289.6 247.5 19.20 26.87 7.7831 3.67

T8 735 155160 312.1 247.5 21.73 29.45 9.1896 3.88

T9 775 163360 334.3 247.5 24.32 32.06 10.7190 4.08

T10 815 171560 356.3 247.5 26.99 34.73 12.3770 4.29

A

(kN / m)

Y c

mm 2

(mm)

Xc

(mm)(mm) (mm x 10 )3 6

(mm x 10 )4 9

Z1

(mmx 10 )3 6

Zb Ixx


SecondMomentof Area

Self weight per m

xx

Y

Y

Yc

Xc

T-Beam Section Properties




125-150mm topping (typical)

Infill C32/40Typically

13 Joint 508mmCentres

TransverseReinforcement

TECHNICAL MANUAL

T1

T2

T3

T4

T5

T6

T7

T8

T9

T10

T-Beam Span Table Shay Murtagh Precast

*See Design Notes For Loading Assumptions pg 40-41Beam Centres: 508mm

Metres 1 18171615141312111098765432

T10@815mmT9@775mmT8@735mmT7@696mmT6@655mmT5@615mmT4@575mmT3@535mm

T2@420mmT1@380mm

205

33

5 M

AX

50

90

50

5050

6

25495

25

105

90

24

05

07

52

54

0

SPAN 5M TO 17M



TECHNICAL MANUAL


D-Shackle to beused when liftingon-site‘Crosby’ shackle, screw Pin-209Nominal Size 50mmWorking Load Limit=35 Tonnes

Superstrand to beused for liftingspecified characteristic

Lift

ing

Slin

g

Lift

ing

Slin

g

Standard T10

Beam Section

Part Elevation (Beam End)Typical Deck Section

60

60

90

15

45


25 x 25 chamfers


73

81

5

24

0

33

5

205

495

Standard Section of

Typical Reinforcement

for T10 Beam

610610 400 min

50

50

40

25

25

508 centres


Infill C32/40Typically

125-150mm insitu deck (typical) with infill concrete between beams

13 Joint

T Beam Typical Details Shay Murtagh Precast


40

Typical Strand Layout

for T10 Beam

Strands @ 45mm c/c

Stra

nd

s @

40

mm

c/c

72.5

102.5

45

15

0

58

min

65

Max

72

min

76

Max

OPE for TransverseReinforcement@ 610C/C

50

102.5

72.5


TECHNICAL MANUAL

TY-Beam properties Shay Murtagh Precast

Section ModulusType Depth

D

TY1 400 188790 145.5 7.69 13.46 1.9581 4.72 217.5

TY2 450 200170 161.4 9.71 17.35 2.8011 5.00 237.7

TY3 500 212560 179.7 12.35 22 3.9538 5.31 258

TY4 550 225970 200.2 15.62 27.28 5.463 5.65 278.3

TY5 600 240390 222.7 19.54 33.1 7.373 6.01 298.6

TY6 650 255830 247 24.14 39.38 9.7266 6.40 318.9

TY7 700 272280 272.9 29.42 46.04 12.565 6.81 339.2

TY8 750 289740 300.2 35.41 53.06 15.926 7.24 359.4

TY9 800 308220 328.6 42.11 60.4 19.851 7.71 379.7

TY10 850 327710 358.2 49.56 68.05 24.375 8.19 400.1

TY11 900 348220 388.6 57.76 76.01 29.539 8.71 420

A Wf

(mm)

Yc

mm 2

(mm)

Zt

(mm) (mm x 10 )3 6

(mm x 10 )3 6

Zb

(mmx 10 )4 9

I xx

(kN/m)

AreaSecond Moment

of Area

Height ofCentroid

above Soffit Self-Weight Top of Flange

x x

Y

Y

Yc

Wf

TY-Beam Section Properties



SPAN 4.5M TO 17.5M

TECHNICAL MANUAL


TY11@900TY10@850TY9@800TY8@750TY7@700TY6@650TY5@600TY4@550TY3@500TY2@450TY1@400

125 topping(typical)

See Section Properties

Infill C32/40typically


765 centres (typical)

Infill Concrete


TY1

TY2

TY3

TY4

TY5

TY6

TY7

TY8

TY9

TY10

TY11

TY-Beam Span Table Shay Murtagh Precast


1Metres 1918171615141312111098765432

Wf



TECHNICAL MANUAL

58

0

90

0

40

40

40

40

180 60

OPE for TransverseReinforcement@ 610mm Centres

15

40 50 44 56 50 45 7575 45 50 56 44 50 40

15

180

60

50

420

80

13

5

5

25

25

11

0

10

5


Superstrand to beused for liftingspecified characteristic

Lift

ing

Slin

g

Lift

ing

Slin

g

60

90

15

45

60Tandum Crane Lifting

Rebate Optional



Standard TY11

Beam Section

Typical Strand

Layout for

TY11 Beam

Standard Section of


For TY11 Beam

Part Elevation (Beam End)Typical Deck Section

Stra

nd

s @

50

mm

c/c

400 min

280

185

285

610610


Infill C32/40mmTypically

125mm topping (typical)

15 Joint 765 Centres

TY-Beam Typical Details Shay Murtagh Precast

750



TECHNICAL MANUAL

x x

Y

Y

Yc

Xc

Wf

TYE-Beam properties Shay Murtagh Precast

Section ModulusType Depth

D

TYE1 400 244080 179.2 317.3 14.23 17.54 3.142 6.10 483.7

TYE2 450 268520 201.6 310.6 18.07 22.28 4.4905 6.71 493.9

TYE3 500 293470 224.8 305.4 22.54 27.6 6.2035 7.34 504

TYE4 550 318920 248.8 301.4 27.62 33.45 8.3207 7.97 514.2

TYE5 600 344880 273.3 298.2 33.31 39.81 10.882 8.62 524.3

TYE6 650 371350 298.4 295.8 39.62 46.68 13.929 9.28 534.4

TYE7 700 398330 323.9 294.1 46.54 54.04 17.503 9.96 544.6

TYE8 750 425810 349.8 292.8 54.09 61.88 21.646 10.65 554.7

TYE9 800 453800 376 292 62.27 70.21 20.401 11.35 564.9

TYE10 850 482290 402.6 291.6 71.1 79.03 31.814 12.06 575

TYE11 900 511300 429.4 291.5 80.59 88.33 37.928 12.78 585

A

(mm)

WfYc

mm 2

(mm)

Xc

(mm)

Zt

(mm) (mm x 10 )3 6

Zb

(mmx 10 )4 9

1xx

(kN/m)

AreaSecond Moment

of Area Self-Weight

Height ofCentroid

above Soffit

Distance tocentroid

fromvertical face

Top of Flange

TYE-Beam Section Properties



TECHNICAL MANUAL

TYE11@900TYE10@850TYE9@800TYE8@750TYE7@700TYE@650TYE5@600TYE4@550TYE3@500TYE2@450TYE1@400


125-150mmtopping(typical)

Bridge Parapet

Infill C32/40typically

765

centres

SPAN 4.5M TO 17.5M

5 6 7 8 9 10 11 12 13 14 15 16 17 18 191Metres

TYE1

TYE2

TYE3

TYE4

TYE5

TYE6

TYE7

TYE8

TYE9

TYE10

2 3 4

TYE-Beam Span Table Shay Murtagh Precast

TYE11




TECHNICAL MANUAL


Standard TYE11

Beam Section

Standard Section of


for TYE11 beam


Typical Strand

Layout for

TYE11 beam

Part Elevation (Beam End)

Centres765mm(Typical)

600 centres 400 min

585

468

518

750

90

0

58

08

01

10

25

10

5

90

0

700

6565

15 15

585

150

60 60

135

750

87

56

05

0


InfillC32/40typically

125 topping(typical)

Stra

nd

s @

40

mm

c/c

Stra

nd

s @

50

mm

c/c

Strands @ 45-50mm c/c


Superstrand to beused for lifting


Lift

ing

Slin

g

Liftin

g Sl

ing


60

90

60

45

60

15

TYE-Beam Typical Details Shay Murtagh Precast



TECHNICAL MANUAL

M-Beam properties Shay Murtagh Precast Height ofcentroidabovesoffitType Depth

D A

(kN/m)

Yc

mm 2

(mm x 10 )(mm)(mm)3 6

(mm x 10 )3 6

Z t Zb

Area Section Modulus Self weight/m

M2 720 314600 266 35.37 60.36 7.87

M3 800 346600 310 46.6 73.65 8.67

M4 880 378600 354 58.37 86.73 9.47

M5 960 353000 357 58.92 99.52 8.83

M6 1040 384999 410 74.94 115.15 9.63

M7 1120 417000 460 90.95 130.49 10.43

M8 1200 391399 455 86.87 142.23 9.79

M9 1280 423399 513 107.45 160.66 10.59

M10 1360 455399 569 127.97 177.9 11.39

xx

y

y

Yc

M-Beam Section Properties



TECHNICAL MANUAL


SPAN 16M TO 29M

M10 @ 1360

M9 @ 1280

M8 @ 1200

M7 @ 1120

M6 @ 1040

M5 @ 960

M4 @ 880

M3 @ 800

M2 @ 720

200mmtypical

Centres (See span table)

Insitu slab C32/40 typically

G.R.C. PermanentFormwork

Metres 3012 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

M2

M3

M4

M5

M6

M7

M8

M9

M10

M-Beam Span Table Shay Murtagh Precast




TECHNICAL MANUAL


Superstrand to be usedfor lifting

D-Shackle to beused when lifting on site.‘Crosby’ shackle. Screw Pin-209Nominal Size 50mmWorking load limit = 35 tonnes


Lift

ing

Slin

g

Liftin

g Sl

ing

90

45

60

15

2 No @ 12802 No @ 12302 No @ 11802 No @ 11302 No @ 10802 No @ 1030

2 No @ 9302 No @ 8802 No @ 8302 No @ 7802 No @ 7302 No @ 6802 No @ 6302 No @ 5802 No @ 5302 No @ 4802 No @ 4302 No @ 3802 No @ 330

200mm typical

400minCentres

1000mm30 Joint

50 50 50 75 50 50 50 109109 50 50 50 75 50 50 50

175 17550

50

60

50

400 50

50

50

60

76

0

13

60

80

50

25 25970

160

320

315

80

10

13

52

5

20

0

300

160

120


G.R.C. Permanent Formwork Scabbled Finishto beam end

60

M-Beam Typical Details Shay Murtagh Precast


Standard M10Beam Section

Typical Deck Section Part Elevation (Beam end)

Standard Section ofTypical reinforcement

for M10 beam

Typical strandlayout forM10 beam

4 No @ 16014 No @ 11015 No @ 60



TECHNICAL MANUAL

UM-Beam properties Shay Murtagh Precast Height ofcentroidabovesoffitType Depth

D A

(kN/m)

Yc

mm 2

(mm x 10 )(mm)(mm)3 6

(mm x 10 ) (mm)3 6

Z t Zb c

Area Section Modulus Self weight/m

X

Distance of centroidfrom vertical face

UM2 720 361767 261.5 32.73 57.38 9.05 437

UM3 800 387049 293 40.51 70.1 9.68 434

UM4 880 412144 325 49.03 83.73 10.31 431

UM5 960 437053 358 58.31 98.06 10.93 428

UM6 1040 461775 392 68.34 112.98 11.3 426

UM7 1120 486311 426 79.01 128.71 12.14 424

UM8 1200 510660 460 90.28 145.24 12.77 422

UM9 1280 534823 494.5 102.21 162.24 13.77 420

UM10 1360 558800 529 114.71 180.21 13.97 419

y

y

xx

Yc

Xc

UM10 1360UM9 1280UM8 1200UM7 1120UM6 1040UM5 960UM4 850UM3 800UM3 720

UM-Beam Section Properties



www.shaymurtagh.co.uk



TECHNICAL MANUAL

200mm Typical

400 min


G.R.C. Permanent Formwork Scabbled Finish to Beam End

Centres (see span table)

60

90

45

60

15

Tandum crane lifting Single crane lifting


Superstrandto be usedfor lifting

Lift

ing

Slin

g

Lift

ing

Slin

g

Typical Deck Section Part Elevation (Beam end)

Standard Section ofTypical Shear Reinforcement

for UM9 beam

Possible StrandLayout forUM9 beam

Standard UM9beam Section

25

80

25 25

25

80

25

40

80

80

135

440

310

920

970

65

25

50

50

12

80

12

05

95

0

25 25

101 101468

UM-Beam Typical Details Shay Murtagh Precast

B12 20

53

53

96 98

98

58

58

2No@1050

2No@1000

2No@680

2No@630

2No @160

16No@110

17No@60

135 45 50 50 50 50 50 50 75 50 50 50 50 50 50 50 65




TECHNICAL MANUAL

Box-Beam properties 495mm Wide Shay Murtagh Precast

DepthType

D A Yc Z t

(kN/m)

Zb

(mm) (mm) (mm )2

(mm x 10 )3 6

(mm x 10 )3 6

AreaHeight of centroid

above soffitSection Modulus Self weight / m

SD1(1) 300

SD2(1) 400

SD3(1) 500

SD4(1) 600

SD5(1) 700

SD6(1) 800

127625

168125

208625

249125

289625

330125

145

194

244

294

343

393

6.33

11.23

17.5

25.11

34.08

44.4

6.79

11.9

18.38

26.2

33.38

45.91

3.19

4.2

5.22

6.23

7.24

8.25


DepthType

D A Yc Z t

(kN/m)

Zb

(mm) (mm) (mm )2

(mm x 10 )3 6

(mm x 10 )3 6



SD1(2) 300

SD2(2) 400

SD3(2) 500

SD4(2) 600

SD5(2) 700

SD6(2) 800

204125

270125

336125

402125

468125

534125

147

196

246

296

346

396

10.17

18.05

28.13

40.43

54.92

71.62

10.62

18.71

29

41.5

56.21

73.11

5.1

6.75

8.4

10.05

11.7

13.35


DepthType

D A Yc Z t

(kN/m)

Zb

(mm) (mm) (mm )2

(mm x 10 )3 6

(mm x 10 )3 6



SD1(3) 300

SD2(3) 400

SD3(3) 500

SD4(3) 600

SD5(3) 700

SD6(3) 800

270125

358125

446125

534125

622125

710125

148

197

247

297

347

397

13.47

23.92

37.3

53.63

72.9

95.09

13.92

24.58

38.17

54.7

74.17

96.58

6.75

8.95

11.15

13.35

15.55

17.75



TECHNICAL MANUAL

Box-Beam Typical Details Shay Murtagh Precast




SPAN 3M TO 22.5M

125mm typical

Bridge Parapet

495, 750, or 970 preferred

30

0m

m t

o 8

00

mm

(mad

e t

o c

ust

om

ers

pre

fere

nce

)

35

30

45

25 50 C/C

25

Strands @ 210mm

Strands @ 160mm

Strands @ 110mm

Strands @ 60mm

30

0m

m t

o 8

00

mm

(mad

e t

o c

ust

om

ers

pre

fere

nce

)

495, 750, OR 970 preferred


20 Joint(Typical)

50


300

Depth

400

500

600

700

800

Blue = 495mm wide Yellow = 970mm wide *See Design Notes For Loading Assumptions pg 40-41Red = 750mm wide

Box Beam Span Table Shay Murtagh Precast 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

TECHNICAL MANUAL


Typical Section ofShear Reinforcement

for Box Beam

60

Typical Lifting Arrangements


4 No. 10.0T orGreater CapstansRecessed 40mm Min.into top of each unit

Lift

ing

Slin

g


TECHNICAL MANUAL

De

pe

nd

en

t o

n S

ect

ion

60

138

170

60

15101450

VW

EBS

F

Yc

x x

Y

Y

Applies to Beams W16 to W19

75

L3L2

L1

Applies to Beams W1 to W15

W-Beam properties Shay Murtagh Precast

Type Depth

L1 L2 L3 Web S F V mm 2

(mm x 10 )(mm)(mm)3

(mm x 10 )4 96

Yc Z t Zb 1xx

(kN/m)Section

W1

W3

W5

W7

W8

W9

W10

W11

W12

W13

W14

W15

W16

W17

W18

W19

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

2100

2200

2300

572360

606880

641400

692030

726550

761070

812400

846920

881440

933470

975150

1016060

1057970

1102680

1150190

1200500

305.3

345.9

387.5

440.2

484.2

528.7

585.2

631.3

677.6

736.7

790.6

844.3

898.6

954.5

1011.8

1070.5

71.88

89.54

108.76

136.21

159.46

184.11

219.51

248.01

277.84

321.13

362.63

405.7

451.09

499.74

551.68

606.97

116.46

143.43

171.88

204.15

235.73

268.56

305.62

341.33

378.23

419.9

462.97

507.3

552.89

599.75

647.82

697.1

35.556

49.614

66.61

89.871

114.14

142

178.85

215.46

256.28

309.34

366.03

428.3

496.83

572.45

655.49

746.26

14.31

15.17

16.00

17.30

18.16

19.03

20.31

21.17

22.04

23.34

24.38

25.40

26.45

27.57

28.75

30.01

1704.4

1732.4

1760.4

1788.4

1816.4

1844.4

1872.4

1900.4

1928.4

1956.4

1984.4

2012.4

2040.4

2068.4

2096.4

2124.4

203.2

203.2

203.2

210.2

210.2

210.2

217.2

217.2

217.2

224.2

238.2

252.2

266.2

280.2

294.2

308.2

1058

1086

1114

1128

1156

1184

1198

1226

1254

1268

1268

1268

1268

1268

1268

1268

100

200

300

350

450

550

600

700

800

850

950

1050

1050

1050

1050

1050

220

220

220

220

220

220

220

220

220

220

248

276

276

276

276

276

70

70

70

120

120

120

170

170

170

220

192

164

136

108

80

52

-

-

-

-

-

-

-

-

-

-

-

-

128

256

384

512

Area

Section ModulusSelf weightApproximate

DimensionsBeam Top


82.0 275 210 160

150

6060

75

De

pe

nd

en

t o

n S

ect

ion

L2 L3

L1

x x

Y

Y

251510

FS

WEB

25

Yc

82.0

138

170

150

210 160275


TECHNICAL MANUAL


Typical Section Through Bridge


W-Beam Typical Details Shay Murtagh Precast


Precast ConcreteCantilevers Detail

Typical Section

60mm Min. Bearing

Precast ConcreteCantilever Units 100 x 60 RHS

200mm InsituConcrete DeckSlab

Threaded BarCast intoW-Beam

PrestressedConcreteW-Beam

75

75

20

0

Single crane liftingfor lifting both ends

Tandum crane liftingfor lifting both ends


Superstrand tobe used for lifting

45

15

60

Tandum crane lifting


Lift

ing

Slin

g

Lift

ing

Slin

g

90

60

G.R.C.Panels

PrestressedConcreteW-Beam

100mm x 100mmsquare holes

through webs atspecified C/C

spacing



spacing



spacing

60mm Min. Bearing

Precast ConcreteCantilever Units

100 x 60 RHS Insitu ConcreteDeck Slab

PrestressedConcrete W-Beam

75mmPermanentFormwork

Threaded Bar Castinto W-Beam

200mm InsituConcreteDeck Slab

100 60 RHS Precast ConcreteCantilever Units

60mm Min. Bearing



TECHNICAL MANUAL

W-beam Typical Links and Possible Strand Positions

W-Beam Typical Details Shay Murtagh Precast

90 90

B12-02B12-01

B10-03B10-04

32

40

23

00

41

24890

31

3030

90248

4 No @ 2230

4 No @ 2130

4 No @ 2030

2 No @ 1880 2 No @ 1865

2 No @ 17802 No @ 17302 No @ 16802 No @ 16302 No @ 15802 No @ 15302 No @ 14802 No @ 14302 No @ 13802 No @ 13302 No @ 12802 No @ 12302 No @ 11802 No @ 11302 No @ 10802 No @ 10302 No @ 9802 No @ 9302 No @ 8802 No @ 8302 No @ 7802 No @ 7302 No @ 6802 No @ 6302 No @ 5802 No @ 5302 No @ 4802 No @ 4302 No @ 3802 No @ 340

8 No @ 21010 No @ 16028 No @ 11026 No @ 60


Precast Concrete

Precast Concrete

Precast Concrete = Strong + Durable + Versatile

These are the widely known characteristics and benefits of concrete. However precast concrete has much more to offer due to innovative, perfected and proven designs and efficient and perfected production methods.

These developments have led to time and money savings through

• Reduction of initial construction costs• Lower level of maintenance requirements• Quick and easy installation• No on-site delays due to curing

Why choose precast concrete?

• Rapid and efficient build• Lowest whole life costs• Increased accuracy and quality of finish• Low maintenance costs • Large span capabilities• Durability, strength and versatility• High resistance to noise transmission• Excellent thermal capacity• Inherent fire resistance• Buildability• Environmentally friendly


BEARINGSAs a general rule the edge of the bearing closest to the abutment should be detailed a minimum of 150mm from the end of the beam.

Prestressed concrete bridge beams can be used with any type of bridge bearings. However, elastomeric strip bearings and both plain and laminated elastomeric pad bearings are most commonly used for both temporary and permanent support requirements.

The connection between the bearing and the beam is a function of the type of bearing employed and any required inserts into the beam soffit can be easily accommodated. An epoxy mortar bed or similar is frequently specified for elastomeric pad bearings.

Due consideration must be given to the stability of the beams during construction for the type and width of bearing selected.

CAMBERDue to the properties of prestressed concrete units upward camber will be present. As our standard beams are cast on flatbases, built in cambers cannot normally be accommodated.

CAST IN ITEMSCast in items can be included providing that they do not project through the sides or soffit of our standard mouldage.Care should be taken to ensure that any cast in items do not conflict with reinforcement or prestressing strand locations.

CONCRETEThe use of cementitious materials other than RHPC may require a longer curing period prior to detensioning and therefore areto be avoided. Our standard concrete mixes have been designed to attain a transfer strength of C40/50 and a 28 day strengthof C50/60. Other concrete strengths can be considered.

Higher grade concrete is significantly beneficial for most bridge beam designs and can be used in beams manufactured byShay Murtagh with negligible cost implications.

DEBONDINGIt is common practice to debond varying lengths at the ends of a number of strands in order to pass the stresslimit checks at the beam ends. Debonding is typically achieved by inserting the relevant length of strand into a duct. Debonding is inexpensive and a simple procedure from a manufacturing perspective. Debonding more than fourstrands at any single point should be avoided. If large numbers of strands require debonding, it is recommended to doso at multiple debonding points spaced at 500mm or 1000mm gaps.

ENDSSkews up to 45 can normally be incorporated within our standard manufacturing procedures. The acute cornerwill be blocked out above 24 to minimise the risk of spalling. At the beam ends chamfers are provided across the soffitto prevent spalling on detensioning. Scarfed ends and solid end blocks should be avoided where possible. Where dowelslots are specified, account should be taken of the implications of reinforcement and cover detailing.

FINISHESTop finish will be as cast with the side and soffit finishes to the DTp Highway Specification or Eurocodes. Colour variationsoccur between our units and any site in-situ works.

LIFTINGOur standard lifting methods are shown, however methods vary due to beam properties.

LENGTHSThe overall beam lengths should be specified. Small variations in length should be avoided.

REINFORCEMENTLinks are tied to the prestressing strand using stainless steel tying wire as standard. Links must be dimensioned to take accountof strand positions and link diameters when considering cover requirements. For skewed beams links should be detailed square tothe beam centreline and skewed only at the beam ends. Two piece links of different diameters and/or centres should be avoided.To avoid displacement of reinforcement in complex cages during casting it may be necessary to use tack welding. Reinforcementprojecting through the sides and soffit should be avoided and reinforcement couplers should be considered as an alternative.Reinforcement projecting from the beam end should be straight where possible. Special stop ends/couplers may be provided toaccommodate a bob on the projecting bar.

STACKING BEARERSStacking bearers are generally located at 500mm from the beam end.

STRANDOur preferred strand size and type is 15.7mm diameter 7-wire super strands with nominal tensile strength of 1860 N/mmand relaxation class 2. Strands are typically prestressed to 209kN per strand. Debonding techniques can be used.

BRIDGE DESIGNER’S CHECKLIST: DESIGN NOTES




TESTINGOur high standards of quality control make routine load testing unnecessary.

TOLERANCESTolerances should be to either DTp Highways Specification or the Eurocodes.

WEB OPENINGSWeb holes are provided at standard centres as indicated in the details for each beam type.The centres of the first web holes should be at least 400mm from the beam end to avoid the risk of horizontal splitting.

WEIGHTThe weight of the beams used for handling and erection purposes is carefully calculated on a case by case basis, so the client can be economical with crane hire.

ASSUMPTIONS AND DESIGN CRITERIA USED FOR THE SPAN TABLES

The Eurocodes are used in conjunction with the relevant UK or Irish National Annexes Road vehicle live loading is applied using load models LM1, LM2 and the applicable range of LM3 vehicles (SV vehicles only). 150mm average surfacing thickness is assumed (unit weight = 23kN/m ) Grade C40/50 concrete used for the beams, grade C32/40 assumed for the in-situ concrete (Class N cement for both) Exposure Classes XC3/4 and XD1 assumed in conjunction with a 120 design life requirement. Total beam lengths are assumed to be at least 600mm greater than the span length.

The upper limits given in the span tables are necessarily based upon conservative bridge types and conditions. The maximum spans can likely be increased significantly if any of the following are relevant:

- Continuous multiple span bridges- Integral bridges- Wider bridges accomodating three or more notional lanes and/or wide footpaths- Exposure classes XD and XS do not need to be considered

If any of the above conditions are applicable, contact the Shay Murtagh technical department at [email protected] to determine the likely increase in maximum span above what is listed in the span tables.

RAIL APPLICATIONS

The span tables provided are not applicable for rail loading. Please contact the Shay Murtagh technical department for assistance with selecting the most suitable type and size of beam for a given span and structural characteristics. Please indicate the following details:

- Number and length of individual spans.- Indicate the use of full flexural continuity between spans and/or the use of integral connections between the superstructure and the abutments if applicable.- Depth of ballast above the deck.- Type of rail loading to be considered (Typically LM71).

Prestressed concrete beams are ideal for the rapid installation of bridge decks required for limited railway possessions. Shay Murtagh has developed a variety of details to eliminate the need for falsework and to minimize or eliminate formwork requirements for such structures. Please contact the Shay Murtagh technical department to determine how these details may be tailored to a specific rail bridge. Shay Murtagh has considerable experience in determining the optimal construction sequence for such structures and encourages the designer to contact the technical department for any desired assistance.



Shay Murtagh Precast Concrete is a BSI Registered Company. The Quality System fullycomplies with the requirements of BS EN ISO 9001:2000.

Additional Technical Information:

For additional information on Beam Section Properties, Strand Layout, Design Calculations,Drawings & Installation Advice, please contact:

IRL Enquiries:

UK Tel: 0844 202 0263UK Fax: 0844 888 5263Email: [email protected]


Although Shay Murtagh Precast Limited does its best to ensure that any advice, recommendations or information it may give is accurate, no liability or responsibility of any kind (including liability for negligence) is accepted by Shay Murtagh Precast Limited, its staff or agents. Claims and statements made by Shay Murtagh Precast Limited regarding its products refer to those which have been properly handled on site. Shay Murtagh Precast Limited cannot accept any liability or responsibility of any kind including liability for negligence for problems caused by the acts or omissions of third parties or by poor site practices.



CONSTRUCTION

INDUSTRY FEDER

ATION

Shay Murtagh LimitedRaharney, MullingarCo. Westmeath, Ireland.IR Tel: 044 9374108/9374149IR Fax: 044 9374552Website: www.shaymurtagh.ieEmail: [email protected]

UK Tel: 0844 202 0263Website: www.shaymurtagh.co.ukEmail: [email protected]

shay murtag precast beams

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