Roofed Hinge Beam Construction Formula

A 2 by 8 beam would be sufficient.

Roofed hinge beam construction formula.

When beams carry loads that are too heavy for them they start to bend. The same is true for beams like structural ridge beams and center girders. We call the amount of beam bending beam deflection. The total load is 4 000 pounds.

Calculating shear force and bending moment the two important parameters also involved with beam load calculations are shear force sf and bending moment bm. F stands for the beam s fiber strength in bending which depends on the species of wood. Two 2 by 4 beams together would not be enough. The formula for the section modulus is beam width times beam depth squared divided by 6.

In the example the beam spans the 10 foot width of the roof. The above formula may be used for finding out the reaction of a loaded beam about its end supports. Beams are the long members of a structure that carry the loads brought by the horizontal slabs of the structures including floors and roofs. Too often builders gang together 2 inch dimension lumber to support roof and floor loads without considering other options.

For the initial calculation f can be estimated at 1 000. Beam deflection is the vertical displacement of a point along the centroid of a. L stands for the span of the beam in feet. You can t beat sawn lumber for most small window headers but as spans and loads increase stronger materials are a better choice.