#2015 LVL BEAM SPAN TABLES HOW TO#

The floor joists are still 12' long but now you can see a floor beam running horizontally across the middle of the house (supported by the lower concrete foundation wall). See the picture below for a plan view of how this will look. So we will have to place wood floor beams (or likewise, wood ceiling beams) across the width of the house to support the floor joists. Now at 24 feet, we are beyond the span capabilities of our table in our previous example. It would be possible to still frame the floor in the same way as above but just run the floor joists in the opposite direction (looking for a lumber size to span 13') but for our example, we are going to keep the floor joists running in the same direction. So the house dimensions will now be 24' X 13'. Let's expand our house beyond that 17'2' span capability to 24 feet wide.

The widest span in the floor joist span table in Part 2 of this tutorial module showed that floor joists can span 17'2' if they are 2 X 12s spaced 12' o.c. For now, we'll look into supporting the floor joists with a floor joist beam. The wall could be either a properly sized structural concrete or concrete block wall or a wood framed wall. This support could take the form of a structural wall. Once we go beyond the allowable spans for floor joists (as shown in the floor joist span tables), we will need some kind of support under these floor joists. Using Floor Beam Span TablesĬontinuing on from Part 2: Wood Joist Span Tables of Residential Structural Design, we were just about to make our example house wider. Or see our Design Your Own House tutorial site map. Or even go back as far as the residential structural design page which explains basic house structure. If you are just starting out, you might want to go to the joist page since we will expand on the house design example introduced there.

#2015 LVL BEAM SPAN TABLES HOW TO#

This site also has information on learning how to read joist tables and a joist calculator. You'll find a beam span calculator towards the bottom of this page. On this page we will explain how to read and design with floor beam span tables. Designing with Floor Beam Span Tables Part 3 of Residential Structural Design

2015 lvl beam span tables