TN-9 Load Tables for Col&Beams - Twin Creeks Log Home S

1 TECH NOTESP ublished by western Wood Products association , 522 Fifth Ave., Suite 500, Portland, OR 97204503/224-3930 Report No. 9 2002 Design load Tables for Wood Columns (Posts) 4x4 through 12x12 Incised 4x4 and 4x6In a wood structure, whether it is a deck or a five-story wood frame building, solid wood columns (posts) areoften used. These columns are subject to axial compressive loads, and in some cases, eccentric loads. The design loads of axial compression for simple wood columns subjected to concentric compression loads ofcommonly used lumber products are tabulated in table 1. The design loads for 4x4 and 4x6 lumber for thecommonly used grades are listed in table 2, and for incised lumber in table 3. Tables 4, 5, and 6 containdesign loads for 6x, 8x, 10x and 12x timbers. Please note, these Tables do not consider eccentric 1 AXIAL COMPRESSION load CAPACITY FOR 4x4 AND 4x6 COLUMNSC olumn Capacity (lbs.)

2 Std&BtrSpeciesColumnNo. 2No. 2 STUDSTUDStd&Btr(incisedLength (ft)(incised lumber)1(incised lumber)1lumber)14x44x624x44x624x44x624x4 4x624x44x4317426263161417421384103711556 6837612564156621274841579324001131331990 7983014807802912076141301177151346920663 11591177109018136657510113481197210332 Douglas610936169239738150107942121366800 1034696638627 Fir-Larch7872813582795512344675210404595 1912876857017870001092964681007956388741 5085785461515690956908900530082794696731 0430166774993465510469473514395687639346 1403639566841173856316433248491342720277 9701145677844117711440411749414477220691 2173184989127137607477112541282710740511 8761829510386159328264125476924104781067 19297 Hem-Fir693431450884351305471551096261799 4248485762677320114166734104795989924953 2481876688613485810908454028433494676824 4916951532649429469473494391686840916377 3765585443114028103858604636235673341353 3131684939354833291 Incising is a procedure for improving penetration of preservative treatment whereby incisions are cut into the surfaces of Figure

3 ATN9/1013/11-02 Design Considerations1. Engineering formulas used in computing axial compression design loads are taken from Section of theNational Design Specification for Wood Construction(NDS), 2001 Design values for dimension lumber and timbers are those published in western Lumber Grading Rules1998and the NDS Supplement,2001 A load duration factor (CD) of is used in determining design loads in this Tech Note. This is conserva-tive for load durations less than normal load Tables 1 and 3 contain the axial compression design loads for incised lumber. Lumber design values areadjusted by the incising factor PropertiesCiMOE (E) incising adjustment is required for timbers with a nominal thickness of 5" and thicker, Ci= ; all tab-ulated values for 5" and thicker are applicable to both non-incised and incised Most preservative treatments have no significant affect on the mechanical properties of lumber.

4 No adjust-ment is considered in this Tech Note. 6. The sizes and grades covered in this Tech Note are those commonly manufactured by western mills. Theavailability of these sizes and grades may vary between InformationTechnical information on western lumber products is available through the association s web site our Online Technical Guideat You can receive a publicationsorder form via fax by calling 732-544-2876 and following the recorded B:Strong Axis BucklingExample Application:Post or column sandwiched betweenstructural panels, laterally braced fulllength (structural panelsfastened on narrow faces of wood members with nails, bolts or screws), walls sheathed withstructural wood panels on both A:Weak Axis BucklingExample Application:Single standing column with nobracing or lateral support exceptat the ends, , deck posts seatedin post DirectionBuckling DirectionTable 2 AXIAL COMPRESSION load CAPACITY FOR 4x4 and 4x6 COLUMNSC olumn Capacity (lbs.)

5 ColumnSelect StructuralNo. 1No. 2 StudStd&BtrSpeciesLength (ft)4x44x624x614x44x624x614x44x624x614x4 4x624x614x422309835531347792039231356307 0418384282372767910701162331603316559321 7993489732933192663080629103174262776626 3161037116064155661566241957933910297841 7342299492637515793270362400198301580914 8071413051648332468253231464528700224921 3469259752066390181545313665119726132323 0466205031178826966182601093624504169237 94214971121369663 Douglas 7104882788216335935824723145738728225901 3582675214339104047685 Fir-Larch8837924880130897484221051168870 0020326109295638135418741615196795217821 0632607219387950056901793089004696125847 3104993105598188838769500416830783846941 5635735139341151461404117114682163357338 4186145736561392913582615833261040452003 4441239671416862223548126485563333211815 5225284093244445292013340212349533730421 1030477328591031944842449832538352504142 9481082846262636967541372478906238882130 7430333821702203413133030631183382821327 6131757827127264751004915266150571532631 9125307412890317299277062613616433265772 4849970115090145671440441704529819259511 5523269172361614477257132206991271482313 7601282751419628467218361305025763200531 1876244371829582641444712547106716112982 6589175221046524161162179343226671450871 5513935109628485789092418313885828922095 129127320204281141659891326292496688

6 Hem-Fir870982143411092662019700103425810 1793590844946124167682532695746186548994 5367172348399469415487734940911142063774 3111047291610074104422149326926385813290 6046341310337533135481139521388561963697 1291257953221114165051287792494500296512 3348120175251313311196491327279853427824 5282243839251113287010459450226869757421 5233785593666211172993307215314248691613 9012328855436532023748731761834648428761 8651 See Figure A2 See Figure BTable 3 AXIAL COMPRESSION load CAPACITY FOR 4x4 and 4x6 INCISED COLUMNSC olumn Capacity (lbs.)Select Structural No. 1No. 2 StudStd&BtrSpeciesColumn(incised lumber)(incised lumber)(incised lumber)(incised lumber)(incisedLength (ft)lumber)4x44x624x614x44x624x614x44x62 4x614x44x624x614x42185942848527989164142 5138247071479422635222668592130031287013 3283177562806626796156872477423672141742 2323213848376128901256412748416339274242 4787144592421621932131332184719907802912 7231207611771514263264992182112656234151 9357115912116517710751012491113481033261 1842252241827910537223101626097382022815 010680012181103468627 Douglas795932355014901855320860132837955 189961234459511177891287017

7 Fir-Larch8776021512121016927190881080064 6817478100795085112697854569096340192589 9085663171198849530015766827943011064666 7746551052471699982124689151347338439514 0096876363999215668385611440114901689539 3413283616336911234457803097912848343237 1237381304658593342116395238313710848491 6265683124152275013321011447503428701021 8450126969544422722977518359423621427841 0085436824909007390623398425367020026777 3136204921638125120246591476322619222231 4164217542132480711223012091123433155972 4731235441409322284212681342721391202777 8441211311771117494142672413221659129582 1770196601217320830184987477119371125410 7405123392326618899112992103117289103862 0015159326924116931047892796101502206915 6849370200101446684351888513054617911365 9424762678170205021270175841867111783673 4174141047953241093681876134 Hem-Fir865851861410273613317042956454021 5673843344911039469514942953671656383915 0081524578284391138296868376597365854402 8104436145456945414513448648736231206156 7331688986493933291137181270158253476117 8354453033104794753268581874195278912315 5110884947295210312462725729116403322977 3893593236713270897104248253590453975220 6796334611983663531052032142349854336852 1997968344919126993300117275946270517621 See Figure A2 See Figure BTable 4 AXIAL COMPRESSION load CAPACITY FOR 6x6 and 6x8 COLUMNSC olumn Capacity (lbs.)

8 ColumnSelect StructuralNo. 1No. 2 SpeciesLength (ft)6x66x826x816x66x826x816x66x826x81234 4614720146993300044107240915210272876828 6743340284689646402296804084240473208342 8630284104333714645045506291944050939810 2054728431280185324384584344234285114005 8388792014728164274736311624504742493275 8639473376181961227820267447294824403140 203263733873135963189152738825793 Douglas827387427563734724841378073387418 0322685324589 Fir-Larch9249654118934044230153667631384 1695826202231241022400393113054620989353 1528621157212542121437111989437138271281 8906337202578114386245001961712175863472 9239811690231909230481303523437177751315 5393218421190150612993220538117422224816 0111413761296171876513421278631830210550 2096014386151223027128166781198425781163 4294781961712925161091624787148861073423 7581463785301826211632229205400103982525 4943490434764172762363323558328820397393 9300252053470034370171222352423348428235 3934338502247703440233777168942336523037 5274003880237364241563399932940165772315 3226056262563809235804233233347431803161 5422880220287247503718233750222273280730 3101560322537212778228833603931204208493 197528430149062211520326

9 Hem-Fir920749346332829419219309532620814 0552160019166101852532953252621743629726 2377713070209831782211163853101922344156 3328292213171199720255163591214440288951 9691139222667518985109021941414866131273 1266761736012371249261686998431846913422 1411255244641534811000231161500088601744 0120811599912234413624980621317133717971 1635910870168910203681214987721958811962 71811526297931 See Figure A2 See Figure BApplicable to both non-incised and incised lumberTable 5 AXIAL COMPRESSION load CAPACITY FOR 8x8 and 8x10 COLUMNSC olumn Capacity (lbs.)ColumnSelect StructuralNo. 1No. 2 SpeciesLength (ft)8x88x1028x1018x88x1028x1018x88x1028x 1012643658168581529560077105970942392294 9760496903639498136281002556947081670546 3904149614494524633418089880232552407046 8699703877049405491095625138027979183546 2570005691923840649129486476614287948877 8095382769418681813793748781480537600427 850476053528156869166899373474835247306 Douglas858303772997385151556678076530436 6184783546383

10 Fir-Larch9561667584371144500126674763349 3573147217452591053606741066790148157654 8860999346654648943909115064372056641474 5982640075824433408456374231712473586967 5599874351362286551163196044649404821343 8876696055591408176031351702303384351438 4281440387639375115637995580884812728582 4222736204153699360664468573515655632445 3126750407883388316338015722542814323985 2986410372490339208315442545596924569108 4759660393602893222740877408213541906895 9686404731860176599363207840761406324536 4968547679564691259866594223186240594403 5855291267998670224636259453587253157240 3753999265194467294657964564658928578193 1200400983952075070366416642244473758277 5666730733397573892884914465339622504360 25748355229301563934738198 Hem-Fir947227640365982142209565305346429 4553885837309104493562478569184053555395 5134528613382823624411422986063953578385 8054059488682762137608349861239402585054 9909363745250646074264743682833534133637 6560784607633990507274305425185359323190 1143336053392422563152248728399282378234 9143012415304695050438594290694653336821 2230833776282571627774474963518126711441 86338342081232522263621 See Figure A2 See Figure BApplicable to both non-incised and incised lumberTable 6 AXIAL COMPRESSION load CAPACITY FOR 10x10, 10x12 and 12x12 COLUMNSC olumn Capacity (lbs.)