DESIGN OF STEEL STRUCTURE QUIZ

According to IS:800, in the Merchant Rankine formula the value of imperfection index (n) is

1.8

1.4

2

1

TRUE ANSWER : ?
YOUR ANSWER : ?

The heaviest I-section for same depth is

ISHB

ISWB

ISMB

ISLB

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The basic wind speed is specified at a height ‘h’ above mean ground level in an open terrain. The value of ’h’ is

30 m

20 m

10 m

40 m

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The mechanism method of plastic analysis satisfies

equilibrium condition only

equilibrium and mechanism conditions

equilibrium and plastic moment conditions

mechanism and plastic moment conditions

TRUE ANSWER : ?
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The least dimension in case of a circular column of diameter D is taken as

0.88 D

0.78 D

0.68 D

0.5 D

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The range of economical spacing of trusses varies from

2L/5 to 3L/5 where L is span

L/4to2L/5

L/3 to L/5

L/3 to L/2

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The risk coefficient k, depends on

mean probable design life of structures

basic wind speed

None of these

both (a) and (b)

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Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds (where t is thickness of web)

50 t

85 t

200 t

250 t

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Normally, the angle of roof truss with asbestos sheets should not be less than

35°

30°

40°

26/2°

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To minimize the total cost of a roof truss, the ratio of the cost of truss to the cost of purlins shall be

5

3

4

2

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