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Project: <br />Location: CT1 <br />page <br />of <br />StruCalc 9.0 <br />StruCalc Version 10.0.1.5 7/11/2025 2:54:43 PM <br />Collar Tie <br />1.5 IN x 7.25 IN x 9.5 FT (9 + 0.5) @ 16 O.C. <br />#2 - Douglas-Fir-Larch - Dry Use <br />1.5 x 9.25 Solid Sawn Lumber with minimum Ft = 575 <br />DEFLECTIONS <br />Live Load <br />Dead Load <br />Total Load <br />Live Load Deflection Criteria: L/240 Total Load Deflection Criteria: L/180 <br />0.06 <br />0.04 <br />0.10 <br />IN L/1953 <br />in <br />IN L/1116 <br />Center <br />-0.01 <br />-0.01 <br />-0.02 <br />IN 2L/1214 <br />in <br />IN 2L/694 <br />Right <br />RAFTER REACTIONS <br />Lower Live Load @ A & B <br />Lower Dead Load @ A & B <br />Lower Total Load @ A & B <br />Collar Tie Tension <br />LOADS <br />196 <br />147 <br />343 <br />plf <br />plf <br />plf <br />REACTIONS <br />261 <br />196 <br />457 <br />865 <br />lb <br />lb <br />lb <br />lb <br />RAFTER SUPPORT DATA <br />Bearing Length <br />B <br />0.49 in <br />RAFTER DATA <br />Span Length <br />Unbraced Length-Bottom <br />Rafter Pitch <br />Collar Tie Location <br />Roof Duration Factor <br />Peak Notch Depth <br />Base Notch Depth <br />9 <br />9.28 <br />3 <br />2.49 <br />1.25 <br />0.00 <br />0.00 <br />ft <br />ft <br />Interior <br />:12 <br />ft <br />0.5 <br />0.52 <br />ft <br />ft <br />Eave <br />MATERIAL PROPERTIES <br />Bending Stress: <br />Shear Stress: <br />Modulus of Elasticity: <br />Comp. ┴ to Grain: <br />Controlling Moment: <br />4.501 Ft from left support of span 2 (Center Span) <br />Created by combining all dead loads and live loads on span(s) 2 <br />Controlling Shear: <br />8.731 Ft from left support of span 2 (Center Span) <br />Created by combining all dead loads and live loads on span(s) 2, 3 <br />Comparisons with required sections: <br />Section Modulus: <br />Area (Shear): <br />Moment of Inertia (deflection): <br />Moment: <br />Shear: <br />Fb = <br />Cd=1.25 CF=1.20 Cr=1.15 <br />Fv = <br />Cd=1.25 <br />E = <br />Fc - ┴ = <br />486 ft-lb <br />-420 lb <br />900 <br />180 <br />1600 <br />625 <br />psi <br />psi <br />ksi <br />psi <br />Base Values <br />Fb' = <br />Fv' = <br />E' = <br />Fc - ┴' = <br />1553 <br />225 <br />1600 <br />625 <br />psi <br />psi <br />ksi <br />psi <br />Adjusted <br />3.75 <br />2.8 <br />12.36 <br />486 <br />-420 <br />in3 <br />in2 <br />in4 <br />ft-lb <br />lb <br />Req'd <br />13.14 <br />10.88 <br />47.63 <br />1700 <br />1631 <br />in3 <br />in2 <br />in4 <br />ft-lb <br />lb <br />Provided <br />RAFTER LOADING <br />Uniform Floor Loading <br />Roof Live Load: <br />Roof Dead Load: <br />Non-Snow Roof Loaded Area: <br />Slope Adjusted Spans And Loads <br />Interior Span: <br />Eave Span: <br />Rafter Live Load: <br />Eave Live Load: <br />Rafter Dead Load: <br />Rafter Total Load: <br />Eave Total Load: <br />LL = <br />DL = <br />RLA = <br />L-adj = <br />L-Eave-adj = <br />wL-adj = <br />wL-Eave-adj = <br />wD-adj = <br />wT-adj = <br />wT-Eave-adj = <br />20 <br />15 <br />0 <br />9.28 <br />0.52 <br />25 <br />25 <br />19 <br />45 <br />45 <br />psf <br />psf <br />sf <br />ft <br />ft <br />plf <br />plf <br />plf <br />plf <br />plf <br />LOADING DIAGRAM <br />0.5 ft 9 ft <br />2.49 ft <br />18 ft <br />0.39 ft <br />COLLAR TIE DESIGN <br />1.5 x 9.25 Solid Sawn Lumber with minimum Ft = 575 <br />Tension Parallel to Grain <br />Collar Tie Location <br />Collar Tie Tension <br />Collar Tie Capacity <br />Nailing Required @ Both Ends <br />16d Common <br />16d Sinker <br />16d Box <br />Ft = <br />Cd=1.25 Cf=0.00 <br />575 <br />2.49 <br />865 <br />14959 <br />5 Nails <br />6 Nails <br />7 Nails <br />psi <br />ft <br />lb <br />lb <br />Base Values <br />Ft' = 1078 psi <br />Adjusted <br />25