Tji Roof Spans

Their dimensional stability helps resist the warping twisting and shrinking that can lead to squeaky floors.

Tji roof spans.

I would like to use the loft as a lounge possably adding a dormer on one side of the roof. 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. Tji joist specifier s guide tj 4000 july 2019. The tji joist were developed about 50 years ago and continue to be a great engineered wood product providing strength and consistency for high performance floor and roof structures.

Span calculator for wood joists and rafters also available for the android os. Fire safe construction 3 floor performance and tj pro rating 4 5 section 1. Tb 824 ceiling joist. Also available for the android os.

The joist sit on top of 2 x 4 walls nailed to rafters. Engineered wood products ewp span and size charts for bci joists. Walls are 8 made of 2 x4 16 oc with double top plate. Tj 9510 installation guide for floor and roof framing with tji s31 s33 and s47 joists east canada.

The link below provides additional information and span tables for tji joists in ceiling applications. Rafters are 2 x 6 24 oc set on 2 x 8 ridge board notched on to walls. Tj 9006 installation guide for deep depth tji 360 560 and 560d joists. L span in feet d out to out depth of the joist in inches el value from table above for tji 110 210 230 and 360 joists δ 22 5 wl4 2 el 2 67 wl2 d x 105 for tji 560 joists δ 22 5 wl4 el 2 29 wl d x 105 material weights include tji weights in dead load calculations.

Tji 360 joists 3 8 25 117 8 14 16 1 tji 560 joists 7 16 3 117 8 14 13 w uniform load in pounds per linear foot l span in feet d out to out depth of the joist in inches el value from table above for tji 110 210 230 and 360 joists δ 22 5 wl 4 2 el 2 67 wl 4 d x 10 5 for tji 560 joists. 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. Secondly the ceiling joists and end connections will require further consideration if thrust loads from a conventionally framed rafter roof system are present.