Steel Design Sheet 12
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1) Question.
Which of the following are the possible modes of failure in axially loaded steel column
member?
1. Local buckling 2. Crushing
3. Overall flexural buckling 4. Torsional bucklingAnswer. -
2) Question.
Which of the following statement(s) is(are) true?
1. Battens are not recommended for a column subjected to eccentric load in the plane
of connecting system.
2. To check the distortion of the column section at the column ends, tie plate (batten) is
provided at the end of the lacing system and this should be able to resist the force to
which the lacing flat is subjected.
3. Rolled section other than flats can not be used for lacing.Answer. -
3) Question.
Two ISMC 400 are placed back to back at a spacing of 300 mm and carry an axial load
of 180 kN. As per IS 800 : 2007, its lacing system should be designed to resist a
transverse shear force (in kN) ofAnswer.Lacing is designed for a shear force equal to 2.5% of vertical load= (2.5x180)/100=4.5 KN
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4) Question.
Which of the following statements are CORRECT?
1. Splice plates are designed for yield strength of tension member.
2. Use of lug angle increases strength of connection.3. By providing proper edge and end distance shear failure of plate can be avoided.
Answer. -
5) Question.
Arrange the following sections in increasing order of shape factor.
1. I-section 2. Hollow tube section
3. Diamond section 4. Triangular section
5. H-sectionAnswer.I section=1.12,
hollow tube 1.27
diamond section =2
Tringular 2.34
H- section 1.5
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6) Question.
For the fillet weld of size 8 mm as shown in figure the effective throat thickness is
Answer.As per Is specification k=0.7 (for fusion angle 60-90 degree)
so throat thickness=0.7x 8= 5.6 mm
so thickness= 6 mm
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7) Question.
In a connection, strength of plate in yielding is 250 kN, and in tension is 260 kN. Plate is
connected by 4 bolts having bolt strength of 60 kN per bolt. What is the efficiency of
the connection?Answer.Strength of bolt= {(minimum strength of bolt)/(minimum strength of plate)}x 100={(60x4)/(250)}x 100=96%
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8) Question.
What should be maximum pitch in compression for a lap connection between plate
200ISF8 and plate 200ISF10?
Answer.Maximum pitch in lapping joint= 12t or 200 mm= 12x 8 mm= 96 mm or 200 mm, which is less
so= 96 mm, [Lesser plate thickness is taken ]
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9) Question.
An equal angle of area A has been welded on one side of a Gusset plate and carries tension along the axis. What is the effective area of the angle?
Answer. -
10) Question.
The permissible stresses in a weld are usually taken as
Answer.