Nirma University
Design of structure-I
Nirma University
Institute of Technology
Department of Civil Engineering
CL 501 – Design of Structure 1
Term Assignment- 7
BOLTED AND WELDED CONNECTIONS
A. BOLTED CONNECTIONS:
Q-1
Write down clauses for bolted connections from IS code.
Q-2
Explain various types of bolt.
Q-3
Draw Figure of black bolt with various part.
Q-4
Explain types of bolts base on type of force.
Q-5 Explain classification of bolts base on failure modes.
Q.-6 Explain black bolts, high strength bolt and HSFG bolts.
Q.-7 Describe advantage and disadvantage of bolted connections.
Q-8 Design the lap joint between plates of size 100 x 16 mm and 100 x 10
mm thick so as to transmit a factored load of 100 kN. Using single row of bolt
of grade 4.6 and grade 410 plate.
Note : Change in load – G1 100 kN, G2 – 50kN , G3 – 120kN , G4 – 70kN.
Q-9
Determine the bolt value of 20 mm dia. Bolt connecting 10 mm plate in
1. Single shear 2. Double shear, bolts grade 4.6, plate 410 grade.
Note : Plate thk – G1 10mm, G2 20mm, G3 – 15mm, G4- 12mm.
Q-10 An ISA 100mm x100mm x 100mm carries a factored tensile force of 100
kN. It is to jointed with 12mm thick gusset plate. Design a high strength
bolted joint when,
(a) No slip is permitted
(b) When slip is permitted.
Note : Change in load – G1 100 kN, G2 – 50kN , G3 – 120kN , G4 – 70kN.
Q.-11 Two plates of 10mm thickness are connected by a single bolted lap joint
with 20mm diameter bolts at 60mm pitch. Calculate efficiency of the joint.
Take fu of plate as 410 Mpa. Assume 4.6 grade bolts.
Plate thk – G1 10mm, G2 20mm, G3 – 15mm, G4- 12mm.
Nirma University
Design of structure-I
B Welded Connections
Q-1 Write down advantages of welded connection.
Q-2 Write down disadvantages of welded connection.
Q-3 Write down clauses of welded connection form IS 800 – 2007.
Q-4 Enlist types of welding.
Q-5 Differentiate SMAW and SAW with IS 800 – 2007 criteria.
Q-6 A 18mm thick plate is jointed to 16mm plate by 200mm long butt weld.
Determine the strength of joint. (1) Double V butt weld (2) single B butt
weld is used.
Q-7 A tie member in a truss girder is 250mm x 14mm in size. It is welded to
a 10mm thick gusset plate by a fillet weld. The overlap of the member is
300 mm and the weld size is 6 mm. Determine the design strength of the
join, if the welding is done as shown in fig. What is the increased in
strength of the joint, if welding is done all around. Assume shop welding.
Group 1 thic.plt. – 6 mm, Group 2 – 10 mm, Group 3- 8mm, Group 4 –
12mm
300mm
250mm
Q-8 A tie member of a roof truss consist of 2ISA 100 x 75 x 8. The angle are
connected to either side of a 10 mm gusset plates and the member is
subjected to a working pull of 300 kN. Design the welded connection.
Assume connections are made in workshop. Assume rounded weld.
Group 1 – 200kN, Group 2 – 250kN, Group 3- 300kN, Group 4 – 350kN
Q-9 Two plates of 16mm and 14mm thickness are to be joined by groove weld
as. The joint is subjected to a factored tensile force of 430 kN. Due to some
reasons the effective length of the weld that could be provided was 180mm
only. Check the safety of the join if
(a) Single V-groove weld is provide (b) Double V-groove weld is provided.
Assume the plates to be shop welded (𝛾𝑚𝑤 = 1.25)