p70 value engineering · presented by ze nunes of mach acoustics 25 bishop road, bishopston,...

Presented by Ze Nunes of MACH Acoustics 25 Bishop Road, Bishopston, Bristol, BS7 8LS [email protected] mobile 07730590904

MACH ACOUSTICS

Working with the Construction team

Design by TestingMary Newman Case Study

Student AccommodationPod wallsImpact isolationCorridor wallsSoft treatments in corridorsDoors

Contents – Value Engineering


MACH ACOUSTICS

Not limiting meetings

Using the correct specification

Working with the Construction Team


MACH ACOUSTICS

Presenting clear and understandable information with options

Being proactive in finding cost savings

Working with the Construction Team


MACH ACOUSTICS

Design by testing works by having several design options

Design Options A, B and C

Where:

Option A is based upon standard construction details and is therefore known to work. Option A provides zero cost benefits since it contains typical construction tolerances

Option B is based upon reducing tolerance levels, and hence providing some cost savings

Option C is mathematically proven to work but has zero or little level of tolerance, this option provides good cost savings

Design by Testing


MACH ACOUSTICS

The construction team must fully buy into the Design by Testing Concept.

All three options must be build able.

Procurement times must be considered for all three options.

Early on site testing must be carried out to ensure which design option is to be taken forwards.

To Succeed with Design by Testing


MACH ACOUSTICS

Case Study – Mary Newman Building


MACH ACOUSTICS

New Walls


MACH ACOUSTICS

Upgrading Existing Walls


MACH ACOUSTICS

Upgrading Existing Walls – Design Options

Path 2Path 1

Illustration Not to scale

Path 3

Over Clad Bean

Sound Insulating CeilingTwo Layers of plaster board


MACH ACOUSTICS

LL School Abergavenny - Complex Roof Details


MACH ACOUSTICS

Case Study – UEL Student Accommodation


MACH ACOUSTICS

Pod Walls


MACH ACOUSTICS

One Layer of Plasterboard to Pod Walls


MACH ACOUSTICS

Regulation E1 – Impact Isolation – MACH Acoustics proposed to use carpets as the resilient floor finish.

Regulation E1 - Party walls to corridor spaces - MACH Acoustics proposed to remove the need for high spec walls to corridors.

Regulation E1 – Doors – MACH Acoustics proposed to reduce the performance of doors from 29 dB acoustic doors to 28 dB.

Regulation E3 – MACH Acoustics used the performance standards given in BB93 ‘Acoustic Design for Schools’ to reduce the levels of treatment in circulation spaces.

Cost Saving – Part E - Student Accommodation


MACH ACOUSTICS

B2.13 Impact sound insulation tests should be conducted on a floor without a soft covering (e.g. carpet, foam backed vinyl etc) except in the case of (a) separating floor type 1, as described in this Approved Document, or (b) a concrete structural floor base which has a soft covering as an integral part of the floor.

Regulation E1 – Impact Isolation


MACH ACOUSTICS

ADE states that separating walls and corridors wall must achieve equal performance.

Regulation E1 - Corridor Walls


MACH ACOUSTICS

In the case of student accommodation, all corridor walls are compromised by a door.

Regulation E1 - Corridor Walls


MACH ACOUSTICS

Composite Sound Reduction with a 42 dB Rw Wall

Calculated Sound Reduction Levels - Corridor Walls

Separating Element Area of element

RW

Door 1.8 28 Sound Insulation of Pod wall + Corridor Wall Calculated/Estimated 3.8 62 Wood stud, 2*15mm Soundlock, Mineral wool, Res Bar one side Sound reduction index derived from Gypsum – White Book 1 58 Composite sound insulation 34

Separating element Area of element

RW

Door 1.8 28 Sound Insulation of Pod wall + 40 dB RW Partition Calculated/Estimated 5.1 55

Standard 40 dB RW partition 5.1 42 Composite sound insulation 34

Composite Sound Reduction with a Part E compliant wall


MACH ACOUSTICS

Construction of - Corridor Walls

Sound Reduction Partition Constrution Details

56 dB

Two layers of 12.5mm SoundBloc each side of a 146mm Gypframe ‘C’ Studs at 600mm centres with Gypframe RB1 Resilient Bar to one side. 50mm Isowool Acoustic Partition Roll (1200) in the cavity. Lined each side with 2*12.5mm Soundbloc

42 dB RW

One layer of 12.5 mm FireLine on each side of timber studs at 600mm centres, with 50mm Isowool.

42 dB RW

Two layer of 12.5 mm Wall board on each side of timber studs at 600mm centres, with 50mm Isowool.

43 dB RW

One layer of 15 mm SoundBloc on each side of timber studs at 600mm centres, with 50mm Isowool.


MACH ACOUSTICS

Regulation E3 – states that soft treatments are required within common circulation spaces.

Approved Document E does not provide specific performance standards, it is therefore seen appropriate to use performance standards given within BB93.

Regulation E3 - Student Accommodation


MACH ACOUSTICS

Regulation E3 - Student Accommodation


MACH ACOUSTICS

It can be shown that plasterboard and carpet meets BB93 requirements

Calculated Rt within Corridor and Stair Cores

Reverberation Time Calculation Tmf= 1.47 = Kent Uni - Student Accommodation

L 4.2 Volume Reverberation Time: 125Hz 250Hz 500Hz 1KHz 2KHz 4KHzW 3.4 33 m³ 1.16 1.19 1.41 1.56 1.44 1.28H 2.3 Noise Absorption Coeficient Reverberation Values

Surface Materials W L/H surface area 125Hz 250Hz 500Hz 1KHz 2KHz 4KHz 125Hz 250Hz 500Hz 1KHz 2KHz 4KHz Ceiling Plaster board 14 m² 0.15 0.15 0.10 0.05 0.04 0.05 2.1 2.1 1.4 0.7 0.6 0.7doors Door 0.9 2 2 m² 0.10 0.08 0.08 0.08 0.08 0.08 0.2 0.1 0.1 0.1 0.1 0.1Wall Plaster board 3.4 2.3 8 m² 0.20 0.15 0.10 0.05 0.04 0.05 1.6 1.2 0.8 0.4 0.3 0.4Wall Plaster 3.4 2.3 10 m² 0.02 0.03 0.04 0.05 0.04 0.03 0.2 0.3 0.4 0.5 0.4 0.3Wall Plaster 4.2 2.3 8 m² 0.02 0.03 0.04 0.05 0.04 0.03 0.2 0.2 0.3 0.4 0.3 0.2Wall Plaster 4.2 2.3 8 m² 0.02 0.03 0.04 0.05 0.04 0.03 0.2 0.2 0.3 0.4 0.3 0.2floor 6 mm needlefelt carpet stuck to concrete 35% 5 m² 0.01 0.02 0.05 0.15 0.30 0.40 0.0 0.1 0.2 0.7 1.5 2.0

- - - - - - - - - - - - - -- - - - - - - - - - - - - -- - - - - - - - - - - - - -

Total Surfaces 4 4 4 3 4 4

Air 33 m³ 0.003 0.003 0.003 0.003 0.003 0.003 0.099 0.099 0.099 0.099 0.099 0.099

Objects Quantity 125Hz 250Hz 500Hz 1KHz 2KHz 4KHz 125Hz 250Hz 500Hz 1KHz 2KHz 4KHz- 0 - - - - - - - - - - - -- 0 - - - - - - - - - - - -- 0 - - - - - - - - - - - -- 0 - - - - - - - - - - - -- 0 - - - - - - - - - - - -- 0 - - - - - - - - - - - -- 0 - - - - - - - - - - - -- 0 - - - - - - - - - - - -

Total Object 0.0 0.0 0.0 0.0 0.0 0.0

Total 5 4 4 3 4 4


MACH ACOUSTICS

ADE requires a reasonable level of sound insulation between living spaces and circulation spaces,

ADE advises that the sound insulation of the door achieves 29 dB Rw. MACH Acoustics propose to use 28 dB Rw doors.

Acoustic Performance of Doors

Leader Flush


MACH ACOUSTICS

Acoustic Requirements From the Door


MACH ACOUSTICS

Increased Levels of Soft Treatments in Corridors


MACH ACOUSTICS

Noise Reduction in Corridors Due to Ceiling Tiles

p70 value engineering · presented by ze nunes of mach acoustics 25 bishop road, bishopston,...

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