Floor Joist Design Example

Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor.

Floor joist design example.

Draw the purlin and show the dead loading. See the image below for an example of joists spaced 16 on center 16 o c. Design of 2x12 timber floor joist with douglas fir larch design of sawn timber beams or joists. Design of 3 3x12 timber beam with southern pine solved example.

The floor joist spacing is the distance between the centers of any two installed joists. Design a typical floor joist for the two story office building indicated below. Since the example house we are designing for is 12 feet wide we need to find in the floor joist span table a joist size and centering that can span 12 or wider. Calculate the moment due to dead load.

Ce 331 spring 2002 joist and frame design example 1 2 1. Draw the shape of the moment diagram below. The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example. A floor joist appropriately selected to span 10 feet with an l 360 limit will deflect no more than 120 360 1 3 inches under maximum design loads.