Rcc Roof Beam Design

Secondly assume reinforcement area then calculate cross section sizes.

Rcc roof beam design.

Live load 40 psf figure 1. Steel yield strength fy 40 ksi. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. Varma example 2 1 determine the elastic section modulus s plastic section modulus z yield moment my and the plastic moment mp of the cross section shown below what is the design moment for the beam cross section.

Assume 50 ksi steel. Firstly begin the design by selecting depth and width of the beam then compute reinforcement area. Design the roof slab beam and column of house given in figure 1. Continuing on from part 3.

Here l ef is the effective span. Design of doubly reinforced beam flexure i. Slabs s1 and s2 to be designed. Determination of loads and moments on rcc lintel beam the triangular design load coming over the lintel beam can be calculated by the formula.

The design of concrete beam includes the estimation of cross section dimension and reinforcement area to resist applied loads. For beams the concrete only works in compression over a rectangular stress block above the n a. Limit state of collapse shear. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

2 thick brick tile. The thickness of the masonry is given by t and rho is the density of masonry i e. There is a nominal strength that is reduced by a factor which must exceed the factored design stress. Beams generally carry vertical gravitational forces but can also be used to carry horizontal loads i e loads due to an earthquake or wind.

From elastic calculation and the. Reinforced concrete beam members strength design for beams sstrength design method is similar to lrfd. There are two approaches for the design of beams. Beams resist compression and tensile forces and add rigidity to the structure.

Design of doubly reinforced beam flexure ii. Rcc beams are cast in cement concrete reinforced with steel bars. Concrete compressive strength fc 3 ksi. Here we have a wood framed gable roof.

Design for shear contd pdf unavailable. Let s consider a basic gable wood roof framing design.