In the _______ trusses, a load on the deck is first transmitted to stringers, then to floor beams, and finally to the joints of the two supporting side trusses.

Question

Question

This question was previously asked in

JKSSB JE Civil Jal Shakti 5 Dec 2022 Official Paper (Shift 2)

Answer 1

Explanation:

Truss Bridge :

A truss is a series of individual members, acting in tension or compression and performing together as a unit.
On truss bridges, a tension member is subject to forces that pull outward at its ends.
In a truss bridge, two long - usually straight members known as chords - form the top and bottom.
They are connected by a web of vertical posts and diagonals.
The bridge is supported at the ends by abutments and sometimes in the middle by piers.
A load on the deck is first transmitted to stringers, then to floor beams, and finally to the joints of the two supporting side trusses.

Roof Trusses:

They are economical for spans more than 6 m.
The pitch of a roof truss (Rise/Span) should be 1/4 to 1/6 to its slope for proper drainage. For symmetrical trusses, the pitch is equal to half the inclination of the top chord.
The spacing of roof trusses is kept at 1/3 to 1/5 of the span.
Roof trusses usually require very light members.

Perfect truss:

A truss that has got enough members to resist the loads without undergoing deformation in its shape is called a perfect truss. The triangular truss is the simplest perfect truss and it has three joints and three members.
For a perfect truss m = 2j - 3

Where,

the total number of members = m

total number of joints = j