MASCO Catalog: Concrete Forming & Accessories

243 MASONS SUPPLY COMPANY Oregon (800) 537-3407 ♦ Washington (800) 537-6216 Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Ridgefield | Seattle | Tacoma | Woodinville M A S C O . N E T GENERAL & TECH INFO CHARTS Note: F b and F v shown above includes a 25% increase because of short term loading conditions. Horizontal shear stress adjustment assumes members have no splits, checks or shakes. Support spacings are governed by bending, shear or deflection. Maximum deflection e /270 of spacing, but not more than 1/8". Safe Spacing of Supports for Joists or Studs Continous Over Four or More Supports Based on use of No. 2 Grade Spruce-Pine-Fir or Hem-Fir Uniform Load, Pounds per LF (Equals Design Load, Pounds per Sq. Ft. Times Joist or Stud Centers in ft.) F b = varies psi E = 1,300,000 psi F v = 175 psi Nominal Size Lumber, bxh (S4S) at 19% Maximum Moisture 2 x 4 2 x 6 2 x 8 3 x 6 4 x 2 4 x 4 F b psi 1594 1381 1275 1381 1275 1594 100 62" 88" 108" 99" 41" 77" 200 52" 74" 91" 84" 32" 65" 300 44" 65" 82" 76" 26" 59" 400 38" 56" 71" 70" 22" 55" 500 32" 50" 63" 65" 20" 52" 600 27" 43" 57" 59" 18" 48" 700 25" 39" 51" 55" 17" 44" 800 22" 35" 46" 51" 16" 41" 900 21" 32" 43" 47" 15" 39" 1,000 19" 30" 40" 43" 14" 36" 1,100 18" 29" 38" 40" 14" 33" 1,200 17" 27" 36" 38" 13" 31" 1,300 16" 26" 34" 36" 12" 29" 1,400 16" 25" 33" 34" 12" 27" 1,500 15" 24" 31" 32" 11" 26" 1,600 15" 23" 30" 31" 11" 25" 1,700 14" 22" 29" 30" 10" 24" 1,800 14" 22" 29" 29" 10" 23" 1,900 13" 21" 28" 28" 9" 22" 2,000 13" 21" 27" 27" 9" 21" 2,200 13" 20" 26" 26" 9" 20" 2,400 12" 19" 25" 24" 8" 19" 2,600 12" 18" 24" 23" 8" 18" 2,800 11" 18" 24" 22" 7" 17" 3,000 11" 17" 23" 22" 7" 17" Joist or Stud Centers Support Spacing Support Spacing Support Spacing