In case horizontal stiffeners are not used, the distance between vertical legs of flange angles at the top and bottom of a plate girder, is known as
Overall depth
Clear depth
Effective depth
None of these
Correct Answer :
B. Clear depth
Related Questions
The forces acting on the web splice of a plate girder are
Axial forces
Shear and axial forces
Shear and bending forces
Axial and bending forces
On steel structures the dead load is the weight of
Steel work
Material fastened to steel work
Material supported permanently
All the above
The maximum tensile and compressive bending stress in extreme fibres of rolled I-sections and channels on the effective section, is
1500 kg/cm2
1420 kg/cm2
1650 kg/cm2
2285 kg/cm2
In rolled steel beams, shear force is mostly resisted by
Web only
Flanges only
Web and flanges together
None of these
In the virtual work method, the virtual quantity is
Displacement
Load
Slope
Moment
The deflection of beams may be decreased by
Increasing the depth of beam
Increasing the span
Decreasing the depth of beam
Increasing the width of beam
Tongue plates are provided in a steel girder at
The upper flange
The lower flange
The upper end of the web
The upper and lower ends of the web
The range of economical spacing of trusses varies from
L/3 to L/5
L/4 to 2L/5
L/3 to L/2
2L/5 to 3L/5, where L is span
The shape factor of an isosceles triangle for bending about the axis parallel to the base is:
1.5
1.7
2.0
2.34
Battening is preferable when the (i) Column carries axial load only (ii) Space between the two main components is not very large (iii) Column is eccentrically loaded The correct answer is
Only (i)
Only (iii)
(i) and (ii)
(ii) and (iii)
In case of cantilever fillers, the ratio of the span L to depth d, should not exceed
4
8
12
16
Rolled steel beams are:
Mainly used to resist bending stress
Used as independent sections to resist compressive stress
Used as independent sections to resist tensile stress
All the above
When plates are exposed to weather, tacking rivets are provided at a pitch in line not exceeding (where t is the thickness of the outside plate).
8 t
16 t
24 t
32 t
Lug angle is
Used with single angle member
Not used with double angle member
Used with channel member
All the above
When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (Where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)
Is at the maximum distance from CG of the rivet group
Is at the minimum distance from CG of the rivet group
Gives the maximum angle between the two forces Fa and Fm
Gives the minimum angle between the two forces Fa and Fm
The distance between e.g. of compression and e.g. of tension flanges of a plate girder, is known as
Overall depth
Clear depth
Effective depth
None of these
The failure of a web plate takes place by yielding if the ratio of the clear depth to thickness of the web, is less than
45
55
62
82
The web crippling due to excessive bearing stress can be avoided by
Increasing the web thickness
Providing suitable stiffener
Increasing the length of the bearing plates
None of the above
The maximum slenderness ratio of a compression member carrying both dead and superimposed load is
180
200
250
350
An imaginary line along which rivets are placed, is known as
Rivet line
Back line
Gauge line
All the above
If the area of cross-section of a single angle discontinuous strut is 30 cm2 and allowable working stress corresponding to its slenderness ratio is 625 kg/cm2, the safe load carrying capacity of the member, is
10 tonnes
12 tonnes
15 tonnes
18 tonnes
If fbt and fc are the co-existent bending tensile stress and shear stress in a member, the equivalent stress fc is
√(fbt² + fc²)
√(fbt² + ½fc²)
√(fbt² + 3fc²)
√(fbt² - 3fc²)
In a grillage footing, the maximum shear force occurs at the
Edge of grillage beam
Centre of base plate
Centre of grillage beam
Centre of base plate
With usual notations of the letters, the shear stress fs at any point of the cross-section is given by
fs =FQ/It
fs =Ft/IQ
fs =It/FQ
fs =IF/Qt
The elastic strain for steel is about
1/12 of strain at the initiation of strain hardening and about 1/120 of maximum strain
1/2 of strain at the initiation of strain hardening and about 1/12 of maximum strain
1/12 of strain at the initiation of strain hardening and 1/200 of maximum strain
1/24 of strain at the initiation of strain hardening and about 1/200 of maximum strain
The size of a butt weld is specified by the effective throat thickness which in the case of incomplete penetration, is taken as
½ of the thickness of thicker part
¾ of the thickness of thicker part
¾ of the thickness of thinner part
7/8 of the thickness of thinner part
The net area of round bars to resist the tension, is the area of cross section at
Mid-section
Root of the thread
Difference of (a) and (b)
None of these
For a standard 45° fillet, the ratio of size of fillet to throat thickness is
1 : 1
1 : √2
√2 : 1
2 : 1
The basic wind speed is specified at a height 'h' above mean ground level in an open terrain. The value of 'h' is
10 m
20 m
25 m
50 m
As per IS : 800, for compression flange, the outstand of flange plates should not exceed
12 t
16 t
20 t
25 t Where t = thickness of thinnest flange plate