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Design of Gantry Girder MCQ

The document discusses the design of gantry girders, which are beams used to support cranes that move loads laterally across buildings or structures. It provides 7 multiple choice questions testing understanding of gantry girder design considerations. Specifically: 1) Gantry girders can be designed as laterally supported or unsupported beams to support vertical and lateral/longitudinal forces. 2) Relevant loads to consider in design include gravity, lateral, and longitudinal loads as well as wind loads. 3) The top channel of a gantry girder functions to increase moment of inertia, reduce torsional stiffness, and increase lateral buckling strength. 4) Gantry girders

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Avinash Kumar (RA1911001030001)
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469 views2 pages

Design of Gantry Girder MCQ

The document discusses the design of gantry girders, which are beams used to support cranes that move loads laterally across buildings or structures. It provides 7 multiple choice questions testing understanding of gantry girder design considerations. Specifically: 1) Gantry girders can be designed as laterally supported or unsupported beams to support vertical and lateral/longitudinal forces. 2) Relevant loads to consider in design include gravity, lateral, and longitudinal loads as well as wind loads. 3) The top channel of a gantry girder functions to increase moment of inertia, reduce torsional stiffness, and increase lateral buckling strength. 4) Gantry girders

Uploaded by

Avinash Kumar (RA1911001030001)
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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OBJECTIVE TYPE QUESTIONS

1. Gantry girders are usually designed as


(a) laterally supported beams 6) laterally unsupported beams
for combination of vertical loads and either of the lateral and longitudinal forCe
c) a

(d) both (b) and (c)


2. Gantry girders can be designed
i) as laterally supported beams
(i) as laterally unsupported beams

(iil) using channel sections only


of these
(a) only (i) is correct b) i) and (ii) are correct
(c) ), ü) and (ii) are correct (d) (i) and (11) are correct
3. Which of the following loads are to be considered in designing a gantry girder in an indusni
building?
i)Gravity loads (ii) Lateral loads (ii) Longitudinal loads iv) Wind loads
Select the correct answer using the codes given below:
(a) G) and (i) b) ), (i) and (ii) (c) (i) and (ii) (d) (i), (ii) and (iv)
Design of Gantry Girder 307

given
Fig.
Fig. 8.13 shows a typical section of a crane
4.
The
following
stateme in this regard girder. Consider
the
function of the top channel is to:
The
(i) increa moment of inert about vertical axis.
(i) reduc moment of ertia about horizontal axis.
incease
torsional stiffness.
ii)
(iv) increase lateral buckling strength of these
statements,
and (iv) are correct
(b) (ii) and (iii) are correct Fig. 8.13
(a) (i)
and (iv)
(ii) are correct
(d) i), (Gii) and (iv) are correct
(c) (i).
In a workshop. usually a crane girder spans between
worksh
In a
5.
(a) adjacent columns along the length of the shop
column across the shop
(b) opposite
bottom ord memben of a
adjacent roof trusses
(c)
(d) insufficient data
For gantry girders carying electrically operated overhead travelling cranes, the lateral force are
6.
increased by
(a) 25% of maximum static wheel load
maximum static wheel load
(b) 10% of
(c) 10% of weight of the crab and weight lifted by the crane
of the crab and weight lifted by the crane
(d) 5% of the weight
exceed
7. When gantry girders carry moving load such as charging cars, the deflection should not

L L L
(a) 500 (b) 600
() (d)
1000
750

ANSWERS

2. (b) 3. (b) 4. (d) 5. (b) 6. (c) 7. b)


1. (d)

EXERCISES

and has the following data:


1, A 60 kN hand-operated crane is provided in a building
of building) 15 m
Centre-to-centre distance of the gantry beam (width
7.5 m
Longitudinal spacing of columns (span of gantry)
50 kN
Weight of the crane
3 m
Wheel spacing 10 kN
Weight of the crab I m
Minimum hook approach 250 MPa
Yield stress of steel
lateral support to it.
Design a simply supported gantry girder assuming

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