The bracing provided in the plane of end posts is called
Sway bracing
Portal bracing
Top lateral bracing
Bottom lateral bracing
Correct Answer :
B. Portal bracing
Related Questions
For the economical design of a combined footing to support two equal column loads, the projections of beams in lower tier are kept such that bending moment under column is equal to
Bending moment at the centre of the beam
Half the bending moment at the centre of the beam
Twice the bending moment at the centre of the beam
None of these
Maximum pitch of rivets, used in steel stacks, is limited to
6 t
10 t
12 t
16 t Where t is thickness of thinner plate being connected
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
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
To keep the intensity of bearing pressure between the column base and concrete compressive and to vary from zero to 2P/BL, the ratio of the moment M to the axial load P should be
L/2
L/3
L/4
L/6
Pick up the correct statement from the following:
The steel beams placed in plain cement concrete, are known as reinforced beams
The filler joists are generally continuous over three-supports only
Continuous fillers are connected to main beams by means of cleat angles
Continuous fillers are supported by main steel beams
Assuming the values of maximum deviation ΔP and ΔE to be 25% of the computed value of P and E respectively, the minimum value of the factor of safety is
1.00
0.67
1.67
2.67
According to IS Specifications, the maximum pitch of rivets in compression is
Lesser of 200 mm and 12 t
Lesser of 200 mm and 16 t
Lesser of 300 mm and 32 t
Lesser of 3 00 mm and 24 t Where t is thickness of thinnest outside plate or angle
The internal pressure coefficient on walls for buildings with large permeability is taken as
± 0.2
±0.5
± 0.7
0
Area of openings for buildings of large permeability is more than
10% of wall area
20% of wall area
30% of wall area
50% of wall area
As per IS: 800, in the plastic design, which of the following pairs are correctly matched?
Working Loads Load factor
(i) Dead load 1.7
(ii) Dead Load + imposed load 1.7
(iii) Dead load + load due to wind or 1.3 seismic forces
(iv) Dead load + imposed load + load 1.7 due to wind or seismic forces
Of these statements
(i) and (ii) are correct
(i), (ii) and (iii) are correct
(ii) and (iii) are correct
Only (i) is correct
For a cantilever beam of length L built-in at the support and restrained against torsion at the free end, the effective projecting length l is
l = 0.7 L
l = 0.75 L
l = 0.85 L
l = 0.5 L
Poisson's ratio for steel within elastic limit, ranges from
0.15 to 0.20
0.25 to 0.24
0.25 to 0.33
0.33 to 0.35
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
Effective length of a column effectively held in position and restrained in direction at both ends, is
L
0.67 L
0.85 L
1.5 L
The distance between the outer faces of flanges of a plate girder, is known as
Overall depth
Clear depth
Effective depth
None of these
The minimum width B of a solid casing for a cased beam, is equal to
B = b + 25 mm
B = b + 50 mm
B = b + 75 mm
B = b + 100 mm
Effective length of a column effectively held in position at both ends and restrained in direction at one end, is
L
0.67 L
0.85 L
1.5 L
The maximum slenderness ratio of a compression member carrying both dead and superimposed load is
180
200
250
350
The slenderness ratio of lacing bars should not exceed
100
120
145
180
The permissible stress to which a structural member can be subjected to, is known as
Bearing stress
Working stress
Tensile stress
Compressive stress
According to I.S. : 800 - 1871, lacing bars resist transverse shear equal to
1.0% of the axial load
2.0% of the axial load
2.5% of the axial load
3.0% of the axial load
Effective sectional area of a compression member is:
Gross sectional area - area of rivet hole
Gross sectional area + area of rivet hole
Gross sectional area × area of rivet hole
Gross sectional area + area of rivet hole
For steel members exposed to weather and not accessible for repainting, the thickness of steel should not be less than
4.5 mm
6 mm
8 mm
10 mm
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
In a fillet weld placed on the sides of the base, the metal experiences
Shear
Tension
Compression
All the above
Diameter of a rivet hole is made larger than the diameter of the rivet by
1.0 mm for rivet diameter upto 12 mm
1.5 mm for rivet diameter exceeding 25 mm
2.0 mm for rivet diameter over 25 mm
None of these
If P is the wind pressure in kg/cm2, v is the velocity in km/hour and K is a constant of proportionality, then
P = K/v2
v = K/P2
P = Kv2
P = Kv
The load on a lintel is assumed as uniformly distributed if the height of the masonry above it, is upto a height of
The effective span
1.25 times the effective span
1.50 times the effective span
2.0 times the effective span
The side thrust T on the tie rods provided at the end beam of jack arch of rise R, is calculated from the formula
T = WL/4R
T = WR/8L
T = WL/8R
T = WL/2R