Note: Use of IS: 800 and Steel Tables are permitted in examination.
Q1. a) Fill in the blanks. 15×1=15
ISSQ means Indian Standard Square Bars.
ISLC standsfor Indian Standard Light Channels.
Rivets in double cover butt joints are in double.
Lap, Tee or corner joints required fillet
Members subjected to direct tension are called Tensionmember.
In compression members gross area of section is used.
A truss is usually loadedatthe joint of its member.
Bending stress at the neutral axis is Zero.
The strength of beam is depends upon Section Modulus.
Long columns fail due to Buckling.
b) State True or False.
Riveted butt joints have no coverplates. (False)
Welding requires skilled labour. (True)
In tension members, strength depends upon the grossarea. (False)
Compression member of a crane is calledboom. (True)
In design of beams clear span is used forcalculations. (False)
Q2. Attempt any five questions. 5×6=30
What are the type of failures occur in riveted joint?
Explain the advantages and disadvantages of welded joint?
What do you mean by structural steel? Explain its properties.
What are the different cases by which we can find the net area of the tension members?
Define i) Radius of gyration ii) slenderness ratio iii) effective length
Draw a neat sketch showing various parts of roof truss.
Differentiate between long and short columns.
What are the assumptions made with theory of simple bending?
Write a short note on precautions to be taken for the erection of steel structures.
Q3. Attempt any three questions. 3×10=30
A double riveted cover butt joint is used for connecting two plates of 12 mm thickness. The diameter of the rivets is 22 mm. Calculate the necessary pitch and efficiency of the joint.Use PDSR. (τvf=100 N/mm2,σpf=300N/mm2.)
SA 75 X 50 X 10 mm is to be connected to a gusset plate by 6 mm fillet weld. The load tobe transmitted is 160 kN. Design the weld, Take τvf=102.5N/mm
Design the double angle member if the angles are placed back to back with their longer legs connected on the same side of the gusset plate. The tension member is subjected to a pull of210 kN. Use 16mm PDSR,.,τvf=100 N/mm2, σpf=300N/mm2, σat=150N/mm2.
A simply supported beam carries a superimposed load of 3 kN/m on a clear span of 6.5 m. Design the beam section if the beam is laterally supported along its span.
A single strut ISA 65X65X8mm ofaro of truss is1.36mlong.It is connected by one rivet a teach end. Calculate the safe load, the strut can carry. Refer steel table for stresses etc.