design drawing of steel structures

7/28/2019 Design Drawing of Steel Structures

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'. 5'~ SP~79S2

(4 Hours) [Total Marks :' ,100:, ' .

N.B. : (l) , Question" No.1 is' compulsory and attempt any thr~cfrom r.em,aining

questions.

(2) " Use of I.S. 800 and Steel Table is allowed. ~ 4J?<ft'L(3) Assume suitable data wherever necessary.

(4) Figures to the right indicate full marks.

] '. Figure shows the typical framing" plan of a steel building. Use following data, 40"' '[or the .'design. . ", '.' .

(a) All beams and plate girder support a brick wall of 22$ mm thickness

. and 4 illhigh having unit wt. 20 KN/mJ•

(b) Thickness of RCC slab is 200 mm and top flange is embedded.in

'.' ,." cortcrete. Unit wt.of concrete 25 KN/mJ , '

(c) Live load on slab is 6 KN/mJ and wt. of floor finish is 2 KN/ril2•

(i) Design beam B 1 and plate Girder for maximum bending moment.

(ii) Design the connection between flange and web plate.

(iii) Design end bearing stiffener atsuppor.t.

(iv) Draw longitudinal elevation and cros~,section of plate girder.

Beams @2.5 m C/C

OR

1. (a,.) The trusses of a factory building are spaced at 4.5 m clc and purlinsare 1\8

spaced at i.8m c/c. The pitch of the truss is ~ and the span of the truss "is

10 m. The vertical load on roof surface normal to the roof is 1200 N /m 2.,~. .... ,

Design (i) I section purlins and (ii) angle purlins. ,

" (b) Determine panel p6int live load on truss as per I.S. 875 (part-II) for Q.l(a).' 5

(c) Determine panel point dead load on truss ifw~ight ofA.C sheets is 150 N lth 2, 5weight of bracing is 12 N/m2 , weight ofpurlins and self weight truss to be

assumed.

(d) Write step by step procedure to design wind load as per I.S. 875 (Part III). 6

(e) Draw the details of the sliding and hinged support of truss. 6

2. Design a built up column composed of two channel sections placed back to 20

back, carrying an axial load of 1345 KN. Effective length of column is 5.95 m.

Also design single lacing system with riveted connections. Draw neat sketch to

show details. f~(j)'



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3. (a) Design slab base for ISHB 350 with 350 mm x 16 mm cover plate 14

on each flange. The column carries an axial load of 1200 KN. Assume

6cc=5 N/mm2

•

(i) Design square base plate and (ii) Design base with equal projections.

Also design concrete block if the bearing capacity of soil is 200 KN/m2•

Draw neat sketches to show details.

(b) Draw plan and elevation of a gusseted base for a column. 6

4. (a) Determine tensile and compressive strength of a principal rafter of roof truss 10

Consists of 2 18A 125 X 75 X 8 mm suitably connected at each end with,

10mm thiCk Gusset plate by means of welded connection. The effective length

of member is 2.5 m and tack welds are provided at appropriate intervals.

(b) For the bracket plate shown in the figure, determine the size of weld required 10

to carry a l<;>adof lOO KN safely.:;,

Design a welded stiffened seat connection to join 18MB 350 @514 N/m with 12

the flange of column section ISHB 350 @ 710.2 N/m. The beam has to transmit

an end reaction of 245 KN.

An ISMB 400 is used as a laterally unsupported beam over a simply supported 8

span of 5 m. Determine safe udl on the beam that can carry.

design drawing of steel structures

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