The LIBB8s is light because of the I-beam shape. This feature creates a member that is easy to install and handle on site and in the yard. The I-beam shape is perfect for plumbing penetrations.
The LIB8s is treated to H1.2 in process. This creates a full H1.2 member using market leading technology. Ridding solvent based treatments from the building and is better for all.
The LIB88s is far stronger than conventional timber, giving you a quality floor with less deflection or enabling you to reach that extra span.
The Lumberworx I-Beam is engineered to create a strong but lightweight beam which is ideal for floor and roof systems. Its lightweight nature makes it easy handle on-site, while the strength of the LIB gives the builder and owner a quality floor they can rely on.
We stock the Lumberworx I-beams in the following sizes:
|Thickness (mm)||Widths (mm)|
|88||200, 240, 300, 360|
These are available in lengths 3.0, 3.6, 4.2, 6.0, 7.2, 8.4 and 9.6m please check what’s available and lead times with our team.
Floor Joists, Rafters, Purlins, Wall Framing
|Botanical Name||Pinus Radiata|
|Standard Trade Names||Pine|
|Origin Of Product||Aotearoa (NZ)|
|Density||460 – 560 Kg/m3 @ 12% m.c.|
|Durability||Class 4: Non-durable|
|LIB Size||Joist Depth (mm)||Flange Width (mm)||Joist Weight (kg/m)||øMx (kNm)||øVx (kN)||EIx (kNm²)||GwAw N x 106|
|øMx||Design Bending strength of section for bending about the x-axis.|
|øVx||Design Shear strength of section for shear force in the y direction.|
|EIx||Rigidity in bending about the x-x axis.|
|GwAw||Shear rigidity for shear force in the y direction.|
|Ø||Capacity reduction factor from NZS3603 Ø = 0.90|
(Bending Deflection + Shear Deflection)
For a uniformly distributed load w, over a span L:
Y=k2(5wL4 / 384EIx + wL2 / 8GwAw)
For long duration loads k2 = 2 (Ref. NZS 3603:1993)
Cuts and Penetrations
The LIB uses timber treated in process, eliminating the need for any additional treatment being applied when the LIB web is cut. Please refer to page 8 of the LIB88s Design and Construction Guide for penetrations in floor joists.
The Lumberworx I-Beam (LIB) is treated to H1.2 hazard class. This is achieved by fabricating with all components treated to H1.2 by full penetration methods to the retention levels prescribed in NZS3640:2003 (including amendment 5).
Exposure of LIB to the weather for the period of construction is acceptable and will not result in structural damage. Exposure for longer periods may result in swelling and discolouration.