In factory buildings, the horizontal beams spanning between the wall columns supporting a wall covering, are called
Stringers
Trimmers
Girts
Lintels
Correct Answer :
C. Girts
Related Questions
To minimize the total cost of a roof truss, the ratio of the cost of truss to the cost of purlins shall be
1
2
3
4
Gantry girders are designed to resist
Lateral loads
Longitudinal loads and vertical loads
Lateral, longitudinal and vertical loads
Lateral and longitudinal loads
Select the correct statement
Material cost of a rivet is higher than that of a bolt
Tensile strength of a bolt is lesser than that of a rivet
Bolts are used as a temporary fastening whereas rivets are used as permanent fastenings
Riveting is less noisy than bolting
The effective length of a battened strut effectively held in position at both ends but not restrained in direction is taken as
1.8 L
L
1.1 L
1.5 L
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 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
When the upper column does not provide full bearing area over lower column, the column splice is provided with the following assumption
Bearing plate is assumed as a short beam to transmit the axial load to the lower column section
Axial load is assumed to be taken by flanges
Load transmitted from the flanges of upper column and reactions from the flanges of lower columns are equal and form a couple
All the above
Web crippling generally occurs at the point where
Bending moment is maximum
Shearing force is minimum
Concentrated loads act
Deflection is maximum
In rolled steel beams, shear force is mostly resisted by
Web only
Flanges only
Web and flanges together
None of these
If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin's formula will be
16 mm
20 mm
24 mm
27 mm
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 spans are considered approximately equal if the longest span does not exceed the shortest span by more than
5 %
10 %
15 %
20 %
The channels get twisted symmetrically with regard to its axis
Parallel to flanges
Parallel to web
Perpendicular to flanges
Perpendicular to web
In double lacing, the thickness t of flat lacing is
t < 1/40 th length between inner end rivets
t < 1/50 th length between inner end rivets
t < 1/60 th length between inner end rivets
t < 1/70 th length between inner end rivets
Generally the purlins are placed at the panel points so as to avoid
Axial force in rafter
Shear force in rafter
Deflection of rafter
Bending moment in rafter
The cross-section of a standard fillet is a triangle whose base angles are
45° and 45°
30° and 60°
40° and 50°
20° and 70°
In a truss girder of a bridge, a diagonal consists of mild steel flat 4001.S.F. and carries a pull of 80 tonnes. If the gross-diameter of the rivet is 26 mm, the number of rivets required in the splice, is
6
7
8
9
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
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
A steel beam supporting loads from the floor slab as well as from wall is termed as
Stringer beam
Lintel beam
Spandrel beam
Header beam
A web plate is called unstiffened if the ratio of clear depth to thickness is less than
35
50
65
85
The maximum permissible slenderness ratio of a member carrying loads resulting from wind, is
180
200
250
300
Pick up the correct statement from the following:
The ends of a strut, are connected together with two rivets
The members of strut will have at least two connections spaced equidistant in their length
The members when separated back-to-back, the connecting rivets should pass through solid washer or packing
All the above
The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is
1.0 mm
1.5 mm
2.0 mm
2.5 mm
The minimum thickness of a steel plate, which is directly exposed to weather and is not accessible for cleaning and repainting, should be:
4.5 mm
6 mm
8 mm
10 mm
Rolled steel angle sections are classified as
Equal angles
Unequal angles
Bulb angles
All the above
Effective length of a column effectively held in position and restrained in direction at one end but neither held in position nor restrained in direction at the other end, is
1.5 L
0.67 L
0.85 L
2 L
The capacity of the smallest pressed steel tank is
1000 litre
1650 litre
1950 litre
2450 litre
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 beams supporting the steps of a stair are generally known as
Headers
Trimmers
Stringers
Spandrel beams