141.
Maximum spacing of lacing bars shall be such that the maximum slenderness of the main member between consecutive lacing connection is not more than
A
60
B
30
C
40
D
50
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Maximum spacing of lacing bars shall be such that the maximum slenderness of the main member between consecutive lacing connection is not more than
60
30
40
50
Load carrying capacity of compression member depends upon
cross-sectional area
end condition
slenderness ratio
all the above
Limit state of strength includes
loss of equilibrium of whole or part of structure
fracture by excessive deformations
fracture due to fatigue
all the above
Lacing shall be designed to resist transverse shear Vt equal to
2.5% of P (axial compression)
4.0% of P
5.0% of P
10.0% of P
Lacing and battening of columns is to increase..............of column.
sectional area
least radius of gyration
section modulus
none of the above
It is recommended that columns should preferably spliced at
point of maximum shear
point of zero shear
point of contraflexure
anywhere
IS 800–2007, divides sections into...............number of buckling classes.
3
4
5
6
IS 800–2007 recommends use of................connections as far as possible.
riveted
bolted
welded
any of the above
Irrespective of grade, the following properties of steel are same
unit weight
modules of elasticity
Poissons ratio
all the above
In the design of hands operated gantry girders, the impact factor for vertical loads to be considered is
10%
15%
20%
25%
In the design of gantry girders impact factor for vertical loads for electrically operated cranes is taken as
10%
15%
20%
25%
In the design of a connection of tension member to a gusset plate, the principle to be followed is
section should be compact
as large portion of it as is possible is connected
centre of gravity of member should be through the middle of thickness of gusset plate
all the above
In showing welded connection the length of the weld shown should be
effective length only
effective length + size of weld
effective length + 2 × size of weld
effective length + 4 × size of weld
In roof trusses bracings should be provided at top chord level in the
end panels using flats
end panels using angles
last but one panel using flats
last but one end panel using angles
In roof trusses bracings should be provided at bottom chord level in the
end panels using flats
end panels using angles
last but one panel using flats
last but one panel using angles
In lap joints with welding, lap should not be less than
4 × t or 40 mm
5 t or 50 mm
6 t or 60 mm
100 mm
In double angle tension member of a truss tacking bolts are provided at a distance not exceeding
600 mm
800 mm
1000 mm
1200 mm
In designing gantry girders impact factor for horizontal force along rails is taken as
5%
10%
15%
25%
In designing connection between web plate and flange plate, shear stress is calculated using moment of inertia of
web plate only
web plate and flange plates
half the web plate and a flange plate
one flange plate only
In case of planed edges, minimum edge distance shall not be less than................times bolt hole diameter.
1.25
1.5
1.75
2