Mayina awo ndi osiyana, kapangidwe ka bolodi ndi kosiyana, ndipo mphamvu yopondereza ndi kulimba ndizosiyana.
LVL, LVB, ndi plywood onse ndi matabwa amitundu yambiri, omwe amapangidwa ndi guluu ndikukanikiza zigawo zingapo za matabwa.
Malinga ndi njira yopingasa komanso yoyima pamakonzedwe a matabwa, imatha kugawidwa kukhala LVL ndi plywood.
Lumber Laminated Veneer Lumber, yomwe imadziwikanso kuti LVL (Laminated Veneer Lumber), ndi mtundu wa matabwa opangidwa kuchokera kumitengo yaiwisi ndi kudula mozungulira kapena kukonza.Akaumitsa ndi kumata, amasonkhanitsidwa mbali ya njere ndiyeno kutentha ndi kukanikizidwa ndi kumata.Ili ndi mawonekedwe omwe matabwa olimba ochekedwa alibe: kulimba kwambiri, kulimba kwambiri, kukhazikika kwabwino, komanso mawonekedwe ake, omwe ndi okwera katatu ndi kulimba kuposa matabwa olimba ochekedwa.Izi zitha kugwiritsidwa ntchito pomanga zigawo za template, matabwa omangira, mapanelo onyamulira, mipando, pansi, chokongoletsera chipinda chamatabwa keel, ndi zida zomangira, zokhala ndi ntchito zambiri.
Zomwe zimakhala zotsika kwambiri zimagwiritsidwa ntchito popanga LVL Scaffolding Planks , LVL Formwork Beams, mipando, mapepala apakati pazitseko, ndi zopangira katundu, pamene zida zapamwamba zimagwiritsidwa ntchito popanga matabwa, mizati, ndi Structural LVL Beams zopangira matabwa.
LVL yonse imayikidwa mbali imodzi, pomwe plywood imayikidwa munjira imodzi yopingasa komanso yolunjika.Mitundu iwiri ya matabwa ili ndi mapangidwe osiyanasiyana ndi kusiyana kwa machitidwe, iliyonse ili ndi cholinga chake komanso kukhazikika kwamphamvu, zomwe zingathe kufufuzidwa.
LVB ndi njira yolumikizira matabwa a plywood, ilinso ndi makonzedwe osiyanasiyana opangira matabwa.Komabe, kuchuluka kwa ma veneers amatabwa omwe amakonzedwa mozungulira komanso motalika nthawi iliyonse sikugawidwa mofanana, zomwe zimatsimikiziridwa malinga ndi zosowa zenizeni (monga 3 yopingasa, 2 ofukula, ndi 3 yopingasa)
Ngati makulidwe ake ndi ochepa (nthawi zambiri pansi pa 25mm), ndiye kuti LVB imagwiritsidwa ntchito nthawi zambiri, chifukwa kuwonjezera ma transverse veneer kumatha kuwongolera kufalikira kwa bolodi kumlingo wina.Ngati pali chofunikira kwambiri champhamvu, ndiye kuti ndibwino kugwiritsa ntchito mawonekedwe a LVL.Pali mitundu iwiri ya mphamvu pa LVL: kutsogolo ndi mbali, ndipo pali mitundu iwiri yoyesera mphamvu: mphamvu yopindika yokhazikika ndi zotanuka modulus.
Kusiyanasiyana kwawo kungathe kufotokozedwa motere:
Kagwiritsidwe: LVL veneer laminated matabwa amagwiritsidwa ntchito makamaka m'nyumba ndi matabwa;Plywood imagwiritsidwa ntchito kwambiri kukongoletsa, mipando, ndi kuyika.Inde, mafakitale ena amapanga LVL monga poplar, yomwe ingagwiritsidwe ntchito ngati mipando, zokongoletsera, ndi zoikamo.
Kapangidwe: LVL laminated veneer ndi plywood onse amapangidwa ndi matabwa a veneer kudzera pa kukanikiza kotentha ndi kumangiriza, koma kachitidwe ka veneer ndi kosiyana.Ma veneers onse a LVL amakonzedwa motsatira mbali imodzi yambewu, ndipo mayendedwe oyandikana nawo amitengo amafanana;Plywood imakonzedwa molunjika komanso mopingasa, ndi zigawo zoyandikana za matabwa amatabwa zolunjika molunjika.
Maonekedwe: Kumbali imodzi, mawonekedwewo ndi osiyana akamawonedwa kuchokera mbali imodzi, ndipo mbali inayo, pamwamba ndi pansi pa Plywood nthawi zambiri zimapangidwa ndi zikopa zamatabwa zopyapyala monga Okoume, Bintangor, Red Oak, Ash, ndi zina zambiri. wokongola kwambiri ndikugogomezera zokongoletsera;LVL laminated veneer, monga nyumba kapena zomangamanga, imagogomezera mphamvu ndi kupotoza, koma ilibe zofunikira zazikulu za mapanelo.
Zida: LVL laminated veneer imapangidwa makamaka ndi matabwa a pine + phenolic resin (osalowa madzi, kutulutsa formaldehyde E0), pomwe Plywood nthawi zambiri imapangidwa ndi matabwa a poplar/eucalyptus + MR guluu (nthawi zambiri imapangitsa chinyezi, kutulutsa formaldehyde E2, E1, E0).
Kusiyanitsa kwakukulu pakati pa ziwirizi kuli pakupanga, kukanikiza kotentha, ndi kusindikiza kwa veneer.Kuchokera pamalingaliro a njira zopangira, matabwa a LVL ndi ovuta kwambiri pakupanga ndi kukonza njira, pomwe plywood ndi yosavuta.
Kusiyanitsa koyambirira ndi kupanga kumatsimikizira kugwiritsidwa ntchito kosiyanasiyana pakati pa ziwirizi.Poyerekeza ndi plywood, bolodi la LVL lili ndi maubwino ambiri mu mphamvu, kukhazikika, kusinthika, kubweza kwamoto, kutsekereza mawu, ndi zina.
Nthawi yotumiza: Aug-22-2023