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WoodWorks® <br />SOFnVARE FOR WOOD DESIGN <br />COMPANY PROJECT <br />Mar. 23.2021 13:35 Stair Stringers <br />Design Check Calculation Sheet <br />WoodWorks Sizer 2019 (Update 1) <br />Loads: <br />Load I Type IDistributionIPat-I Location (ft)I Magnitude Unit I <br />tern Stare End start End <br />ILO• ea Ti D Pif <br />Load2 Llve Full UDL 40.0 olf <br />Maximum Reactions (lbs), Bearing Capacities (lbs) and Bearing Lengths (in) : <br />13'-4.32' <br />fit <br />Unfactored: <br />Dead <br />Live <br />Factored: <br />7e <br />221 <br />7e <br />221 <br />Total <br />Bearing: <br />299 <br />299 <br />F'theta <br />SID <br />510 <br />Capacity <br />Beam <br />764 <br />764 <br />Support <br />1055 <br />1055 <br />Des ratio <br />Beam <br />0.39 <br />0.39 <br />Support <br />0.28 <br />0.20 <br />Load comb <br />82 <br />/2 <br />Length <br />0.50• <br />0.50• <br />Min req'd <br />0.50• <br />0.50• <br />Cb <br />1.00 <br />1.00 <br />Cb min <br />1.00 <br />1.00 <br />Cb support <br />1.13 <br />1.13 <br />F au <br />625 <br />625 <br />oeanrg Teng[n seamy uses; irz- Tor ens suppons <br />Stair Stringers <br />Lumber n-ply, Hem -Fir, No.2, 20, 2-ply (3"x5-1/2") <br />Supports: AN - Timber --soft Beam. D.Fir-L No.2 <br />Total length: 13'4.32; Clear span: 12'-11.8Y; Volume - 1.5 cu.fL; Pitch: 7.6112 <br />Lateral support: top - continuous. bottom - at supports; <br />This section PASSES the design code check. <br />Analysis vs. Allowable Stress and Deflectlon using NDS 2018 : <br />Criterion <br />Analysis Value <br />Design Value <br />Unit <br />Anal sie/Desi n <br />shear <br />fv <br />ps <br />v <br />Bendingl+) <br />fb 650 <br />rb' 1105 <br />psi <br />fb/Fb' - 0.59 <br />Live Dafl'n <br />0.34 L/457 <br />0.43 L/360 <br />in <br />0.79 <br />Total Dafl'n <br />0.46 L/337 <br />0.65 L/240 <br />in <br />0.71 <br />Additional Data: <br />FACTORS: F/E(psi) CD CM Ct CL CF Cfu <br />Cr Cfrt <br />Ci Cn LC/ <br />Fv' ISO 1.00 1.00 1.00 - - - <br />- 1.00 <br />1.00 1.00 2 <br />Fb'+ 050 1.00 1.00 1.00 1.000 1.300 - <br />1.00 1.00 <br />1.00 - 2 <br />Fcp' 405 - 1.00 1.00 - - - <br />- 1.00 <br />1.00 - - <br />E' 1.3 million 1.00 1.00 - - - <br />- 1.00 <br />1.00 - 2 <br />Emin' 0.47 million 1.00 1.00 - - - <br />- 1.00 <br />1.00 - 2 <br />CRITICAL LOAD COMBINATIONS: <br />Shear : LC 82 - D+L <br />Bending(+): LC 02 - D+L <br />Deflection: LC 02 D+L (live) <br />LC N2 - D+L (total) <br />Bearing : Support 1 - LC 02 - D+L <br />Support 2 - LC 02 - D+L <br />D-dead L-live S-IAOw X-wind I -impact Lr-roof live Lc -concentrated E-earthquake <br />All LC's are listed in the Analysis output <br />Load combinations: Aso Basic from ASCE 7-16 2.4 / IBC <br />2018 1605.3.2 <br />CALCULATIONS: <br />V max - 252, V design - 233 lbsr M(+) - 820 lbs-ft <br />EI - 27.04*06 lb-in"2/ply <br />"Liw" deflection is dw to all non -dead loads (live, <br />wind, snow._) <br />Total deflection - 1.0 dead + "live" <br />Bearings Allowable bearing at an angle F'theta calculated for each <br />support <br />as par 11DS 3.10.3 <br />Design Notes: <br />1. WoodWorks analysis and design are in accordence with the ICC International Bulkli g Code (IBC 2018). the National Design SpeciBcatlon (NDS 2018). and NDS Design Supplement. <br />2. Please vedy that the default deflection limits are appropriate for your application. <br />3. Sawn lumber banding members shall be letemiy supported according to the provisions of NOS Clause 4.4.1. <br />4. BUILT-UP BEAMS: it Is assumed that each ply is a single continuous member Mist is. no bull Joints are present) and that each ply is equally top -loaded. Where beams are side -loaded. special fastening details may be required. <br />5. SLOPED BEAMS: level bearing is required for all sloped beams. <br />