Open Web Floor Joists Span Table

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.

Open web floor joists span table.

Spacing of trusses are center to center in inches. 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 minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. The versatility of the trimjoist is unmatched by any other pre engineered wood joist product.

Of bearings and is based on uniformly loaded joists. The maximum span is measured o c. The re engineering of the wooden floor joist that. Dead load deflection is limited to l 360 and total load deflection is limited to l 240.

Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. The spans are based on simple span joists. Due to variations in timber grades load sets support conditions and bearing widths the tables are not suitable as a design tool. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size.

Simply enter the required span to see a range of results that will work. You will be given a range of depths and centres that are available and also an indicative deflection result. No more custom made floor trusses. As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit.

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. 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. Maximum spans published on the chart above may be limited by standard joist configuration. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.

Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Try our interactive span checker to find the posi joist suitable for your project. To find maximum clear span for a given truss depth in a given loading condition refer to the bottom line of. The open web nature of the trimjoist is ideal for plumbing electrical find out more about load opening charts and requirements for the trimjoist floor truss system.