Open Web Roof Joist Span Table

Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall.

Open web roof joist span table.

The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit. The following easi joist span tables are to be used as a basic guide to achievable joist span for given depth and spacing and should be used for estimating of feasibility only. The maximum span is measured o c.

Due to variations in timber grades load sets support conditions and bearing widths the tables are not suitable as a design tool. Because open joist is a stock product the length of an open joist truss determines the size and grade of the truss chords see table below. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. No more custom made floor trusses.

Of bearings and is based on uniformly loaded joists. Dead load deflection is limited to l 360 and total load deflection is limited to l 240. Steel joists joist girders. Trimjoist is the marriage of an open web floor truss and a trimmable wooden i joist bringing the best features of each to the relationship.

The spans are based on simple span joists. Maximum spans published on the chart above may be limited by standard joist configuration.