Simple Span
An I-Joist that spans from one bearing member to another with no breaks in the joist.

Multiple Span
An I-Joist placed continuously over three or more supports.

Rim Board
A continuous member that is attached to the ends of an I-Joist to provide stability, as well as provides distribution for vertical and lateral loads.

Flange
The top and bottom pieces of an I-Joist. This product is typically made from LVL.

Web
The vertical element of an I-Joist, constructed of OSB. The web adjoins the top and bottom piece of the flange and transmits shear forces.

Load Bearing Wall
A wall that transfers loads from above as well as its own weight to the wall or foundation below.

LVL
Laminated Veneer Lumber. A combination of parallel orientation of veneer and adhesive. LVL has a high load capacity and is used in I-Joists as well as beams.

Squash Blocks
Sawn pieces of lumber to be nailed to each side of an I-Joist at the location of a post, load bearing wall, or concentrated load up to 4000 pounds. The squash blocks are cut 1/16" longer than the depth of the I-Joist to insure proper load transfer.

Backer Blocks
Blocks made from wood panels that are attached to the web of an I-Joist to allow for proper fastener design properties.

Blocking Panels
Short pieces of an I-Joist that are cut to fit between floor joists. Blocking panel prevents floor systems from overturning and distributes vertical and horizontal loads shared between two joists.

Filler Blocks
Filler material composed of lumber placed between webs of two adjacent joists. The webs of the joists are nailed to the filler block to assist in load sharing.

Web Stiffener
Wood structure panels that placed between joist flanges and attached to the web. Web stiffeners are 1/8" to 1/4" shorter than the dimension between each flange and are placed tightly to bottom of the I-Joist.

Glu-Lam
Pieces of standard and MSR dimensional lumber stacked, glued and pressed together to produce a beam that can be utilized to carry a wide variety of loads. There are many sizes and types of Glu-Lam.

IJC
(I-Joist Compatible Glu-Lam) A non-cambered 2.1 LE Glu-Lam that is made in I-Joist depths and is a direct replacement for wide and deep LVL.

Camber
Camber is the crowing of a product to assist with carrying the loads it is specified to handle. All cambered beams have up and down sides clearly marked.

Architectural Glu-Lam
A cambered Glu-Lam beam that has a filled and sanded finish. Architectural Glu-Lam is typically utilized in finish applications.

Industrial Glu-Lam
A cambered Glu-Lam that is non-finished and is normally used in hidden beam applications.