Demystifying AS/NZS 2269: Qib CD thiab A- Cov Plywood Piav Qhia

Hauv kev tsim vaj tsev thiab kev tsim kho ntoo thoob ntiaj teb, kev qhia txog cov ntaub ntawv txheej txheem yuav tsum muaj meej meej meej ntawm kev ua raws li kev tsim khoom. Thaum yuav khoom plywood rau thauj khoom-cov hnab ntawv hauv tsev, subflooring, lossis shear phab ntsa bracing thoob plaws Australia, New Zealand, thiab thoob ntiaj teb kev lag luam ua haujlwm raws li cov txheej txheem nruj, lub sijhawmAS2269 Cov qauv plywoodyog universally lees paub. Txawm li cas los xij, rau ntau qhov kev kwv yees thiab cov neeg yuav ntoo, cov ntsiab lus xws li "Qib CD," "A-Bond," thiab "F-Qib Kev Nyuaj Siab" tuaj yeem zoo li nyuaj lossis sib tshooj. Kev nkag siab txog cov kev faib tawm no yog tus yuam sij rau kev ua kom muaj kev nyab xeeb ntawm cov qauv thiab tus nqi - xaiv cov khoom siv zoo hauv qhov chaw ua haujlwm.

Thaum ib qho kev taw qhiaCD structural plywood thickness qhia="" helps="" contractors="" choose="" the="" correct="" sheet="" depth="" for="" specific="" span="" ratios,="" understanding="" the="" underlying="" manufacturing="" standards="" dictates="" whether="" a="" panel="" will="" survive="" real-world="" site="" stresses.="" this="" technical="" article="" breaks="" down="" the="" precise="" requirements="" of="" the="" as/nzs="" 2269="" manufacturing="" standard,="" explaining="" veneer="" grading="" mechanics,="" adhesive="" chemistry,="" and="" stress="" rating="" protocols="" so="" you="" can="" source="" timber="" with="" absolute="">

1. Kev txiav txim siab ntawm Veneer Grading System: "CD" txhais li cas tiag?

Raws li Australian thiab New Zealand tus qauv AS / NZS 2269, plywood ntsej muag raug cais los ntawm cov ntawv teev cov qhab nia xws li A txog D. Cov qib no txhais tau qhov zoo nkauj thiab lub cev zoo ntawm cov ntoo veneers sab nrauv, tso cai rau cov neeg yuav khoom xaiv cov vaj huam sib luag tsim nyog raws li seb daim ntawv yuav raug puas los yog npog.

Lub ntsej muag "C" (Sanded Working Face)

Qib "C" sawv cev rau cov khoom, cov qauv -qib ntsej muag veneer. Thaum nws tsis yog tsim los rau siab -kawg meej architectural tiav (uas siv qib A lossis B), lub ntsej muag C- qib yog sanded thiab tiaj tus. Cov yam ntxwv ntawm cov ntoo xws li cov pob txha nruj, kev kuaj xyuas me me, thiab cov khoom siv hluavtaws ua rau thaj chaw raug tso cai mus txog qhov txwv qhov ntev. Qhov no tsim ib qho khoom, tiaj tus nto uas yog qhov zoo tshaj plaws rau kev tau txais cov ntaub pua plag, yas, pobzeb underlayment, lossis cov vov tsev sab nrauv.

Qib "D" Rov Qab (Un-Sanded Structural Back)

Lub ntsej muag qib "D" sawv cev rau qhov tsis muaj - xuab zeb los yog me ntsis ntaus - thiab - nco cov xuab zeb zoo li cov veneer. Vim tias qib D- qib sab sab hauv mus rau phab ntsa studs, pem teb joists, lossis ru tsev rafters, kev zoo nkauj zoo nkauj yog qhov tsis tsim nyog. Qhib pob qhov qhov txog li 75mm nyob rau hauv dav, ntuj splits, thiab xim variations raug tso cai raws li AS2269 cov kev cai, yog hais tias lawv tsis cuam tshuam tus neeg kho tshuab cross-lamination zog ntawm tag nrho cov ntawv.

2. Adhesive Chemistry: Lub luag haujlwm tseem ceeb ntawm Hom A -Cov kua nplaum Phenolic

Lub vaj huam sib luag plywood tsuas yog muaj zog raws li nws cov kab nplaum. Raws li AS/NZS 2269, cov nplaum tau muab faib ua plaub hom nyiaj sib txawv: A-Bond, B-Bond, C-Bond, thiab D-Bond. Rau qhov tseeb ntawm cov qauv kev ncaj ncees nyob rau sab nraum zoov lossis huab cua- raug tsim kho,Bond CD plywoodyog tus qauv kev lag luam uas tsis yog- sib tham tau.

Vim li cas Hom A -Bond Phenolic Resin tsis tuaj yeem delaminate

Hom A-Cov nplaum nplaum yog tsim los ntawm cov phenol tsaus nti-formaldehyde (PF) resins. Thaum lub sij hawm kev lag luam kub - nias lub voj voog, khaus thermal kub thiab siab ua rau cov resin polymerize rau hauv ib qho chaw ruaj khov, insoluble yas matrix ntawm txhua txheej veneer. Hauv kev sim kuaj, Hom A-Cov qauv ntawv cog lus tau raug kuaj xyuas dej kub npau npau 72 teev. Txawm tias tom qab boiling tas mus li, cov nplaum kab tuav tag nrho shear zog. Qhov no xyuas kom meej tias thaum twgCD structural plywoodyog raug los nag, av nkos, thiab huab cua thaum lub sij hawm framing tsim, lub vaj huam sib luag yuav tsis delaminate los yog o ntawm lub siab ntev.

3. Mechanical Stress Grading: F8, F11, thiab kev ua haujlwm zoo

Nws yog ib qho kev xav tsis zoo uas veneer nto qib (CD) txiav txim siab lub peev xwm ntawm vaj huam sib luag. Hauv kev muaj tiag, vaj huam sib luag lub zog yog tswj hwm los ntawm nws "F-Qib" (Kev Ntsuas Kev Nyuaj Siab), uas ntsuas qhov khoov lub zog, nruj, thiab muaj peev xwm nruj.

Yuav ua li cas cov kev ntsuam xyuas kev ntxhov siab raug xam

AS/NZS 2269 yuam kev kuaj tshuab lossis hom-raws li kev ntsuas kev ntxhov siab. Cov txheej txheem tseem ceeb muaj xws li:

• Modulus ntawm Elasticity (MOE):Ntsuas qhov nruj ntawm lub vaj huam sib luag thiab nws tsis kam rau khoov raws li nyob rau hauv loading.
• Modulus ntawm Repture (MOR):Ntsuas qhov kawg bending load peev ua ntej lub cev ntoo tsis ua hauj lwm tshwm sim.
• Vaj Huam Sib Luag Shear Capacity:Ntsuam xyuas tus ntoo khaub lig-laminated kua nplaum kab lub zog thaum raug rau racking rog, xws li lateral cua loads ntawm phab ntsa braced.

Cov qib kev ntxhov siab ntau rau CD panels suav nrog F8 thiab F11 (feem ntau yog tsim los siv siab -density radiata pine) thiab F14 lossis siab dua (siv hom ntoo tawv). Kev nkag siab txog kev ntxhov siab tso cai rau cov kws tsim qauv tsim kom paub meej lub sijhawm ncua sij hawm rau subfloor joists thiab phab ntsa stud framing.

4. Zam Kev Ua Haujlwm Tsis Ua Haujlwm: Certified vs Non-Structural Panels

Txhim kho un-cov ntawv pov thawj uas tsis muaj daim ntawv pov thawj AS2269 tiag tiag ua rau muaj kev nyab xeeb loj heev rau txhua qhov kev tsim kho. Tsis yog- cov vaj huam sib luag feem ntau siv cov kua nplaum sab hauv thiab hollow veneer cores uas degrade sai heev thaum raug cov av noo. Yuav kom kawm paub yuav ua li cas tsis yog - pawg thawj coj saib tsis ua haujlwm ua rau muaj txiaj ntsig zoo, nyeem peb cov lus qhia dav dav ntawmstructural vs non -structural plywood sib txawv.

Xaus: Koom tes nrog Certified Structural Manufacturers

Kev nkag siab txog AS / NZS 2269 cov qauv txhawb nqa cov neeg yuav khoom los xaiv cov vaj huam sib luag uas muaj qhov sib npaug zoo tshaj plaws ntawm qhov chaw zoo, nplaum ntev, thiab lub peev xwm thauj khoom. Kev qhia txog CD A- Daim ntawv cog lus plywood tau lees paub tias koj lub tsev tsim muaj kev nyab xeeb, ua raws, thiab ruaj khov rau ntau xyoo tom ntej.

Thaum tshawb nrhiav cov cav ntoo uas ua tau raws li kev ua tiav, tso siab rau lub Hoobkas uas tswj hwm kev tswj xyuas kom zoo thiab thib peb -kev kuaj sim. Tshawb nrhiav peb cov ntawv pov thawj tiavAS2269 CD Structural Plywood="" or="" contact="" our="" export="" engineering="" specialists="" today="" for="" technical="" datasheets="" and="" factory-direct="">