Design of Steel Structure - End Semester Examination-2023

The dead load includes

1. Self wt of the structure
2. All superimposed loads
3. wt of stationary equipment
4. All of the above

The effective throat thickness in case of incomplete penetration butt held is taken as

1. \( 7/8^{th} \) of the thickness of the thicker part joined
2. \( 7/8^{th} \) of the thickness of the thinner part joined
3. \( 5/7^{th} \) of the thickness of the thicker part joined
4. \( 5/7^{th} \) of the thickness of the thinner part joined

The effective length of fillet weld should be less than

1. the size of weld
2. two times the size of weld
3. three times the size of weld
4. four times the size of weld

The practical safety factor for the material of bolts is

1. 1.00
2. 1.10
3. 1.15
4. 1.25

Which of the following is not a compression member?

1. tie
2. strut
3. rafter
4. boom

What is the maximum effective slenderness ratio for a tension member in which reversal occurs

1. 180
2. 200
3. 280
4. 300

Lacing shall be designed to resist a total transverse shear equal to of axial force

1. 5%
2. 1%
3. 4.3%
4. 2.5%

An ideal section for compression

1. one having different moment of inertia about any axis through its centre of gravity
2. one having same moment of inertia about any axis through its centre of gravity
3. one having larger length
4. one made up of costly material

Proof stess for minimum bolt tension is

1. \( 0.7f_{yb} \)
2. \( 0.5f_{yb} \)
3. \( 0.7f_{ub} \)
4. \( 0.5f_{ub} \)

The flange is classified as plastic if outstand element of compression flange of rolled section is than

1. \( 8.4 \varepsilon \)
2. \( 9.4 \varepsilon \)
3. \( 10.5 \varepsilon \)
4. \( 15.7 \varepsilon \)

Design a lap joint between the two plates each of width 120mm, if the thickness of one plate is 16 mm and the other is 12 mm. The joint has to transfer a design load of 160 kN. The plates are of Fe410 grade. Use bearing type bolt.

List the 8 loading combination to be considered when considering only DL., LL. and EL.

What are the factors that influence wind pressure coefficient?

Write short note on: (i) Plastic Section (ii) Compact Section (iii) Semi-Compact Section

Design a slab base for a column ISHB 350 @ 710.2N/m subjected to the factored axial compressive load of 120kN. Load is transferred to the base plate by direct bearing of Column flanges take \( f_u = 410 MPa \), \( f_y = 250 MPa \).

Calculate the moment carrying capacity of a laterally Unrestrained ISMB 400 member of length 3 m.

Differentiate between local and lateral buckling of beam.

Design a built-up laced column with four angles to support an axial load of 900kN. The column is 12 m long and both the ends are held in position and restrained against rotation. Assume Fe 410 grade steel.

A tie bar 100 mm x 16 mm is welded to another plate. It is subject to factored pull of 300 kN. Find the minimum overlap required if 8 mm site fillet welds are used. Assume any missing data.

Why is lacing provided in the columns?

A tie member of truss consists of double angle section each 80 mm x 80 mm x 8 mm welded on the opposite side of a 12 mm thick gusset plate. Design a fillet weld for making connection in the workshop. The factored tensile force in the member is 300 kN.