When a tension member is made of four angles with a plate as a web, the allowance for holes is made as
Two holes for each angle and one hole for the web
One hole for each angle and one hole for the web
One hole for each angle and two holes for the web
Two holes for each angle and two holes for the web
Correct Answer :
C. One hole for each angle and two holes for the web
Related Questions
For a steel grillage footing to support two unequal column loads
Line of action of the resultant of two column loads, is made to coincide with the centre of gravity of the base of the footing
Trapezoidal shape is used for the base footing
Projections of beams on either side in lower tier are such that bending moments under columns are equal
All the above
For determination of allowable stress in axial compression, Indian Standard Institution has adopted
Euler's formula
Rankine formula
Perry Robertson formula
Secant formula
The allowable shear stress in the web of mild steel beams decreases with
Decrease in h/t ratio
Increase in h/t ratio
Decrease in thickness
Increase in height Where 'h' is height and t is thickness
The live load for a sloping roof with slope 15°, where access is not provided to roof, is taken as
0.65 kN/m²
0.75 kN/m²
1.35 kN/m²
1.50 kN/m²
The beam outside a wall upto floor level above it, is known as
Rafter
Purlin
Spandrel beam
Lintel
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 best arrangement to provide unified behaviour in built up steel columns is by
Lacing
Battening
Tie plates
Perforated cover plates
A second horizontal stiffener is always placed at the neutral axis of the girder if the thickness of the web is less than
d/250 for structural steel
d/225 for high tensile steel
Both (c) and (b)
Neither (a) nor (b)
In a gusseted base, when the end of the column is machined for complete bearing on the base plate, then the axial load is assumed to be transferred to base plate
Fully by direct bearing
Fully through fastenings
50% by direct bearing and 50% through fastenings
75% by direct bearing and 25% through fastenings
If a pair of angles placed back to back in tension are connected by one leg of each angle, the net effective area of the section, is
a - [b/{1 + 0.35 (b/a)}]
a + [b/{1 + 0.35 (b/a)}]
a - [b/{1 + 0.2 (b/a)}]
a + [b/{1 + 0.2 (b/a)}]
The safe working pressure for a spherical vessel 1.5 m diameter and having 1.5 cm thick wall not to exceed tensile stress 50kg/cm2, is
16 kg/cm2
18 kg/cm2
20 kg/cm2
22 kg/cm2
A 20 mm dia steel bar which is subjected to an axial tension of 2300 kg/cm2 produces a strain of 0.004 cm. If Young's modulus of steel is 2.1 × kg/cm2, the bar is
In the elastic range
In the plastic range
At yield point
None of these
For rivets in tension with countersunk heads, the tensile value shall be
Reduced by 25 %
Reduced by 33.3%
Increased by 25 %
Increased by 33.3 %
If the thickness of a structural member is small as compared to its length and width, it is classified as
One dimensional
Two dimensional
Three dimensional
None of these
Gantry girders are designed to resist
Lateral loads
Longitudinal loads and vertical loads
Lateral, longitudinal and vertical loads
Lateral and longitudinal loads
The thickness of the web of a mild steel plate girder is less than d/200. If only one horizontal stiffener is used, it is placed at
The neutral axis of the section
2/3rd of the depth of the neutral axis from the compression flange
2/5th of the depth of the neutral axis from the compression flange
2/5th of the height of the neutral axis from tension flange
According to IS : 800-1962 the permissible bending stress in steel slab plates, is
1500 kg/cm2
1420 kg/cm2
2125 kg/cm2
1890 kg/cm2
Long column is one
Which is more than 3 m long
Whose lateral dimension is less than 25 cm
Which is free at its top
Which has a ratio of effective length and least lateral dimension more than 15
The use of tie plates in laced columns is
Prohibited
Not prohibited
Permitted at start and end of lacing system only
Permitted between two parts of the lacing
The beams supporting the steps of a stair are generally known as
Headers
Trimmers
Stringers
Spandrel beams
The effective length of a compression member of length L held in position and restrained in direction at one end and effectively restrained in direction but not held in position at the other end, is
L
0.67 L
0.85 L
1.5 L
The centrifugal force due to curvature of track is assumed to act on the bridge at a height of
1.23 m above the rail level
1.50 m above the rail level
1.83 m above the rail level
2.13 m above the rail level
Horizontal stiffener in a plate girder is provided to safeguard against
Shear buckling of web plate
Compression buckling of web plate
Yielding
All of the above
If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be
40 mm
60 mm
80 mm
100 mm
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
The effective length of a fillet weld should not be less than
Two times the weld size
Four times the weld size
Six times the weld size
Weld size
When the bolts are subjected to reversal of stresses, the most suitable type of bolt is
Black bolt
Ordinary unfinished bolt
Turned and fitted bolt
High strength bolt
When two plates are placed end to end and are joined by two cover plates, the joint is known as
Lap joint
Butt joint
Chain riveted lap joint
Double cover butt joint
Live load
Varies in magnitude
Varies in position
Is expressed as uniformly distributed load
All the above
In a tension member if one or more than one rivet holes are off the line, the failure of the member depends upon:
Pitch
Gauge
Diameter of the rivet holes
All the above