Superior Wood Structures ltd
Wood I Beam manufacturer

CANADIAN TABLE SPAN  (Center of bearing)

LIVE LOAD: 40 PSF, DEAD LOAD:15 PSF (Plywood or OSB nailed and glued)

SIB Superior I Beam  2x3 SPF

Height

(inches)

Spacing 12"

 Spacing 16" Spacing 19,2" Spacing 24"
1 2 3 1 2 3 1 2 3 1 2 3
9,5 15'-09"

17'-06"

 18'-01" 14'-10" 16'-07" 16'-07" 14'-04" 15'-07" 15'-07" 14'-05" 14'-05" 14'-05"
11,9 17' 07" 20'-04" 21'-02" 16'-07" 18'-11" 19'-09" 16'-00" 18'-01" 18'-06" 16'-01" 16'-09" 16'-09"
14,0 19'-04" 22'-09" 23'-08" 18'-00" 21'-02" 22'-00" 17'-04" 20'-00" 20'-00" 17'-05" 17'-11" 17'-11"
16,0 20'-11" 24'-11" 26'-00" 19'-05" 22'-11" 22'-11" 18'-07" 20'-11" 20'-11" 18'-08" 18'-08" 18'-08"

SIB Superior I Beam  2x4 MSR

Height

(inches)

Spacing 12"

 Spacing 16" Spacing 19,2" Spacing 24"
1 2 3 1 2 3 1 2 3 1 2 3
9,5 17'-03" 19'-04" 20'-00" 16'-03" 18'-00" 18'-07" 15'-08" 17'-04" 17'-10" 15'-09" 17'-01" 17'-01"
11,9

19'-07"

 22'-07" 23'-04" 18'-02" 21'-00" 21'-09" 17'-06" 20'-00" 20'-09" 17'-07" 19'-08" 20'-04"
14,0 21'-08" 25'-04" 26'-01" 20'-01" 23'-06" 24'-04" 19'-02" 22'-04" 23'-02" 19'-03" 21'-11" 22'-09"
16,0 23'-07" 27'-09" 28'-07" 21'-09" 25'-09" 26'-08" 20'-09" 24'-06" 25'-05" 20'-10" 24'-00" 24'-11"

In accordance with the Canadian low vibrations norms

  1. Span is distance measured between centerline of supports. For a reaction under 1200 lbs, minimum bearing is 1 3/4 in.
  2. Maximum live load deflection is limited to L/360 and maximum total load is limited to L/240..
  3. Whithout gypsum pannels placed directly under span, strapping of 1x4 to 48" c/c shall be installed.
  4. The Superior Wood Structures S.W.S. allowable floor spans meet  norms ASTM D 5055-97, CAN/CSA 086.1-94 and 086.1S1-98, and C.N.B.C. 1995.
  5. The floor spans calculations with low vibrations norms is in conformity to specifications establshed in CCMC report (1997 september edition) (See floor construction details).
  6. Refer to technical manual for installation and construction details (opening on the web, blocking, connections, stiffners, etc.).
  7. No CCMC: 12751-R, BOCA Research Report 21.58, SBCCI Research Report 2012