Design of Steel Structure

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Column Bases and Plate Girder

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A plate girder is used when *

1 point

span is large and loads are light

span is small and loads are heavy

span is large and loads are heavy

span is small and loads are light

Which of the following is economical if depth is limited and loads are too large? *

1 point

welded box plate girder

rolled section beam

bolted box plate girder

truss girder

Which of the following causes web buckling in plate girder? *

1 point

diagonal tension and diagonal compression

diagonal tension

diagonal compression

neither diagonal tension nor diagonal compression

The self weight of a welded plate girder (W) in kN/m may be taken were W is factored superimposed load in kN/m *

1 point

W/300

W/400

W/500

W/250

Minimum spacing of vertical stiffener are limited to (were d is the distance between flange angle) *

1 point

d/4

d/3

d/2

2d/3

Maximum spacing of vertical stiffener are limited to (were d is the distance between flange angle) *

1 point

1.33d

1.25d

1.5d

1.75d

The economic depth of plate girder corresponding to *

1 point

minimum depth

minimum weight

minimum thickness of web

maximum weight

Stiffeners are used in a plate girder *

1 point

to reduce the compressive stress

to reduce the shear stress

to take the bearing stress

to avoid bulking of web plate

The greatest permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to *

1 point

220 t

270 t

230 t

180 t

The thickness of web for unstiffened plate girder with clear distance d between the flanges shall not be less than *

1 point

d/85

d/160

d/100

d/200

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