Load-Span Tables for APA Structural-Use Panels

1 T E C H N I C A L N O T ELoad- span Tables for APA Structural-Use PanelsNumber Q225G February 2011 Load-Span Tables for specific Structural-Use panel applications are included in several APA publications. Recom-mended loads for sheathing and flooring applications in these publications directly reflect minimum performance criteria given in APA PRP-108, Performance Standards and Qualification Policy for Structural-Use Panels , Form E445 and Voluntary Product Standard PS 2-04, Perfor mance Standard for Wood-Based Structural-Use Panels , Form S350. To qual ify for a given span Rating under the standards, a panel must meet all of the criteria for that rating. As a result, mechanical properties that are charac teristic of APA Structural-Use Panels are actually greater than the mini mum necessary to pass one it is sometimes necessary to have engineering design information for structural panel products for condi-tions not specifically covered in the other APA literature, APA publishes separate design capacities for various span Ratings.

2 These values are listed in APA s Panel Design Specification, Form D510. The uniform loads in the following Tables were calculated using these design capacities. These loads are recom mended when engineering principles are used for design. It is important to remember that structural engineering principles alone do not necessarily take into account other factors, such as moisture and thermal conditions, that may impact following Load-Span Tables apply to APA trademarked Structural-Use Panels qualified and manufactured in accor dance with APA PRP-108, Performance Standards and Qualification Policy for Structural-Use Panels , Form E445, Voluntary Product Standard PS 2-04, Performance Standard for Wood-Based Structural-Use Panels , Form S350 and Voluntary Product Standard PS 1-09, structural Plywood, Form L870. These Panels include unsanded, touch-sanded and sanded plywood and oriented strand board (OSB).

3 Loads are provided for applica tions where the panel strength axis is applied across supports and applied parallel to supports. For each combina tion of span and span Rating, loads are given for deflections of L/360, L/240 and L/180 and maximum loads controlled by bending and shear capacity. table 3 capacities may be adjusted for panel type using table 4. For special applica tion conditions for Tables 1, 2 and 3, use the factors listed in table 5, Application Adjustment Factors. table 6, Typical APA Panel Construc tions, is provided to assist in selecting panel constructions for specific span 1a applies to APA Rated Plywood Sheathing. table 1b applies to APA Rated Plywood structural I Sheathing. table 1c applies to APA Rated Plywood Sturd-I-Floor. table 1d applies to APA Rated Plywood structural I Sturd-I-Floor. Tables 2a through 2c apply to APA Rated OSB Sheathing, APA Rated OSB structural I Sheathing, and APA Rated OSB Sturd-I-Floor respectively.

4 For sanded plywood Panels , see table values given in Tables 1 and 2 represent the maximum allowable loads for plywood or OSB. In some cases, load capacities of Rated Sheathing and Rated Sturd-I-Floor may be increased by application of the formulas found in Panel Design Specification, Form D510. Loads should be further adjusted for application conditions using table 5. The values in Tables 1 and 2 are generated assuming dry conditions, normal duration of load and untreated, Exposure 1, structural pan-els. For other conditions, the loads should be appropriately adjusted using the factors given. See the examples for proper use of panel application adjustment factors.(continued on page 12) Load-Span Tables for APA Structural-Use PanelsForm No. Q225G 2011 APA The Engineered Wood Association 1aUNIFORM LOADS (PSF) ON APA RATED PLYWOOD , NORMAL DURATION OF LOAD, DRY CONDITIONS, Panels 24 INCHES OR WIDERSpan Rating(b)Load Governed By(c)Strength Axis(a)Perpendicular to Supports span Center-to-Center of Supports (inches)Parallel to Supports span Center-to-Center of Supports (inches) ,088308381205307409173276112168224120226 5481108771782740534914022324343131192938 2711114212722100355370776571320274347640 /20L/360L/240L/180 BendingShear1,0881,6312,1755214674096148 1829333822433644820327710816321713021853 8010683172436587731613857764613627415538 1221827362610678117157125819294459705931 015202536748/24L/360L/240L/180 BendingShear1,9142,8713,8287755717201,08 01,4404364143945917883033391912863821942 6794140187124211761141521091976710013469 1674872965615031476339129152331251022834 245662251,3811061602131271,0003654724561 9(a)

5 The strength axis is the long panel dimension unless otherwise identified.(b) Nominal thickness may vary within span Rating. For range of thicknesses, see table 5 of APA s Panel Design Specification, Form D510.(c) Tabulated values are based on the most conservative plywood construction, as shown in table 6. Some capacities may be increased by application of formulas in Panel Design Specification, Form Tables for APA Structural-Use PanelsForm No. Q225G 2011 APA The Engineered Wood Association 1bUNIFORM LOADS (PSF) ON APA RATED PLYWOOD structural I , NORMAL DURATION OF LOAD, DRY CONDITIONS, Panels 24 INCHES OR WIDERSpan Rating(b)Load Governed By(c)Strength Axis(a)Perpendicular to Supports span Center-to-Center of Supports (inches)Parallel to Supports span Center-to-Center of Supports (inches) ,088338533205307409190386112168224132316 5481108842492740535419622324347184192938 30156142127241401171762351281,2804466887 29271522302657340/20L/360L/240L/180 BendingShear1,0881,6312,1756257074096148 1835251222433644824441910816321715633053 8010610026043658788243385776562062741554 5185182736311603905857803383901472202931 902835074996817548/24L/360L/240L/180 BendingShear1,9142,8713,8288338677201,08 01,4404696283945917883265141912863822084 0494140187133319761141521172986710013474 2534872966022731476342196152331271556379 551,274506476240359479285345811211621012 13(a) The strength axis is the long panel dimension unless otherwise identified.

6 (b) Nominal thickness may vary within span Rating. For range of thicknesses, see table 5 of APA s Panel Design Specification, Form D510.(c) Tabulated values are based on the most conservative plywood construction, as shown in table 6. Some capacities may be increased by application of formulas in Panel Design Specification, Form Tables for APA Structural-Use PanelsForm No. Q225G 2011 APA The Engineered Wood Association 1cUNIFORM LOADS (psf) ON APA RATED PLYWOOD , NORMAL DURATION OF LOAD, DRY CONDITIONS, Panels 24 INCHES OR WIDERSpan Rating(b)Load Governed By(c)Strength Axis(a)Perpendicular to Supports span Center-to-Center of Supports (inches)Parallel to Supports span Center-to-Center of Supports (inches) oc(d)L/360L/240L/180 BendingShear7181,0771,436379467270405540 2133381482222951482777210714395218355370 6117229435753161253850341361827362712212 1824191061041572091001,13339597956821132 0272050820 ocL/360L/240L/180 BendingShear1,0011,5012,0014424673765657 5324833820630941217327710015020011021849 7398711724060806216135537039136253850321 22162533221061241862481421,1334770938082 11624312850824 ocL/360L/240L/180 BendingShear1,4362,1542,8715885715408101 ,080330414295443591229339143215286147267 7010514094211578611483197507510052167365 4724215024354729129111723191022483724962 171,381931401871221,0003147634361932 ocL/360L/240L/180 BendingShear3,1114,6666,2218757431,1701, 7552,3404925386409601,280342441310465620 2193471522283041402741241862481232561091 6321878217781171566319451771024416825375 0281331,0221,5342,0455715713855777693214 1413019526011425648 ocL/360L/240L/180 BendingShear5,5038,25511,0071,5839522,07 03,1054.

7 1418916901,1331,6992,2656185655498231,09 7396444269403538253351219329438223328193 2893851412781382082771142499013518179216 446688511702,1543,2304,3071,0007338101,2 151,620563531273410547200329(a) The strength axis is the long panel dimension unless otherwise identified.(b) Nominal thickness may vary within span Rating. For range of thicknesses, see table 5 of APA s Panel Design Specification, Form D510.(c) Tabulated values are based on the most conservative plywood construction, as shown in table 6. Some capacities may be increased by application of formulas in Panel Design Specification, Form D510.(d) For 3 ply 16 oc (seldom available): reduce stiffness capacity for strength-axis-parallel-to-supports by 55%, reduce bending capacity for strength-axis- perpendicular-to-supports by 10%, reduce bending capacity for strength-axis-parallel-to-supports by 20%, reduce shear capacity for strength-axis- parallel-to-supports by 30%.

8 Load-Span Tables for APA Structural-Use PanelsForm No. Q225G 2011 APA The Engineered Wood Association 1dUNIFORM LOADS (psf) ON APA RATED PLYWOOD structural I , NORMAL DURATION OF LOAD, DRY CONDITIONS, Panels 24 INCHES OR WIDERSpan Rating(b)Load Governed By(c)Strength Axis(a)Perpendicular to Supports span Center-to-Center of Supports (inches)Parallel to Supports span Center-to-Center of Supports (inches) ocL/360L/240L/180 BendingShear7181,0771,436379653270405540 2134731482222951483887210714395305355370 6124129435753225253850341911827362717112 1824191481572353131401,5875988118791,149 2030402871120 ocL/360L/240L/180 BendingShear1,0011,5012,0014797073765657 5327051220630941218741910015020012033049 7398772604060806724335537043206253850351 8516253324160282423564313390106159212176 2833654726317524 ocL/360L/240L/180 BendingShear1,4362,1542,8716428675408101 ,080361628295443591251514143215286160404 7010514010331957861149029850751005725336 54724622724354732196111723211555608411,1 21481476211316422271345711071429621332 ocL/360L/240L/180 BendingShear3,1114,6666,2218751,0401,170 1,7552,3404927536409601,2803426173104656 2021948515222830414038312418624812335810 9163218783047811715663272517710244236253 750281861,6362,4543,2728565716159231,231 48241420831241517125648 ocL/360L/240L/180 BendingShear5,5038,25511,0071.

9 5831,3332,0703,1054,1418919661,1331,6992 ,2656187915498231,0973966222694035382534 9121932943822345919328938514139013820827 71143499013518179302446688512383,4465,16 86,8911,5007331,2961,9442,59284453143865 6875300329(a) The strength axis is the long panel dimension unless otherwise identified.(b) Nominal thickness may vary within span Rating. For range of thicknesses, see table 5 of APA s Panel Design Specification, Form D510.(c) Tabulated values are based on the most conservative plywood construction, as shown in table 6. Some capacities may be increased by application of formulas in Panel Design Specification, Form Tables for APA Structural-Use PanelsForm No. Q225G 2011 APA The Engineered Wood Association 2aUNIFORM LOADS (psf) ON APA RATED OSB SHEATHING. MULTI- span , NORMAL DURATION OF LOAD, DRY CONDITIONS, Panels 24 INCHES OR WIDERSpan Rating(b)Load Governed By(c)Strength Axis(a)Perpendicular to Supports span Center-to-Center of Supports (inches)Parallel to Supports span Center-to-Center of Supports (inches) ,001371314188282376209228103154206145186 5075100931472437495911620304052108182635 3392131925278210916321813831441618277228 1421282814140/20L/360L/240L/180 BendingShear9791,4681,958625390368552736 3522832013024032442329814619515618248729 6100144395878881343451695611425374945102 1624323188244365487225390921371831272833 146624517548/24L/360L/240L/180 BendingShear1,7402,6103,4808334766559821 ,309469345358537716326282174260347208222 8512817013317569104139117164619112274139 4466886012529435742108142128278539859779 6338476150225300190345517610168213(a) The strength axis is the long panel dimension unless otherwise identified.

10 (b) Nominal thickness may vary within span Rating. For range of thicknesses, see table 5 of APA s Panel Design Specification, Form D510.(c) Some capacities may be increased by application of formulas in Panel Design Specification, Form Tables for APA Structural-Use PanelsForm No. Q225G 2011 APA The Engineered Wood Association 2bUNIFORM LOADS (psf) ON APA RATED OSB structural I , NORMAL DURATION OF LOAD, DRY CONDITIONS, Panels 24 INCHES OR WIDERSpan Rating(b)LoadGovernedBy(c)Strength Axis(a)Perpendicular to Supports span Center-to -Center of Supports (inches)Parallel to Supports span Center-to-Center of Supports (inches) ,001371314188282376209228103154206145186 5075100931472437495911620304052108182635 3392131925278217426134820631465981311162 282233444114140/20L/360L/240L/180 BendingShear9791,4681,958625390368552736 3522832013024032442329814619515618248729 6100144395878881343451695611425374945102 1624323188390585780338390147220293190283 5074996817548/24L/360L/240L/180 BendingShear1,7402,6103,4808334766559821 ,309469345358537716326282174260347208222 8512817013317569104139117164619112274139 446688601252943574210814212827856379551, 27450647624035947928534581121162101213(a ) The strength axis is the long panel dimension unless otherwise identified.