Span calculator for wood joists and rafters also available for the android os.
Floor joist design tables.
2 umber design values l use of these span tables requires reference to the applicable design values for the various species and grades of lumber.
Trus joist tji joists are a key part of making a high performance floor.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Don t worry you won t need to do a lot of calculations in determining the size and placement of the structural framing within your house design.
The 1 grade material is more expensive than the 2 grade but if you can use fewer or smaller 1 grade joists or rafters in your design you may actually save money.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
View joist rafter tables.
Also available for the android os.
Tables w 1 and w 2 of design values for joists and rafters a supplement to these span tables provide such values for them ostc ommonly used framing sizes.
Using floor joist span tables.
The floor joist span tables are based on the loadings given in the amended version of bs 6399 1 which is an imposed load of either a uniformly distributed load of 1 5 kn m or a concentrated load of 1 4 kn.
The dimensional stability of tji joists help them resist warping twisting and shrinking that can lead to squeaky floors.
Apa performance rated i joists pris are manufactured in accordance with pri 400 performance standard for apa ews i joists form x720 this performance standard provides an easy to use table of allowable spans for applications in residential floor construction allowing designers and builders to select and use i joists from various member manufacturers using just one set of span.
Residential structural design vertical structural forces we were about to start learning about floor joist span tables.
Click here for background information regarding design values.
Engineered wood products ewp span and size charts for bci joists.
Tji joists are lightweight and come in long lengths which makes them faster and easier to install than traditional framing and saves you both.
Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability.
True floor joist span calculations can only be made by a structural engineer or contractor.
