Cov hom xws li ntoo thuv, firs, thiab cedars yog gymnosperms. Thaum nws yuav raug hu ua a softwood, Douglas fir yog qhov nyuaj dua li qee qhov angiosperm hardwoods, xws li txiv ntseej. Douglas fir yog ib qho kev xaiv ntoo tawv tawv heev.
Yuav ua li cas ntoo yog fir?
Fir, lossis Douglas fir, yog tawv tawv thiab ruaj khov, thiab nws los ntawm tsob ntoo ntawm tib lub npe. Douglas fir ntoo loj hlob heev, ncav cuag qhov siab ntawm 200 mus rau 300 ko taw yog tias sab laug rau lawv tus kheej cov cuab yeej hauv hav zoov. Ntoo yog rot- thiab kab-resistant, tab sis tsis heev rau qib ntawm cedar.
Puas nyuaj dua ntoo qhib?
Oak yog ntoo tawv thiab Douglas-fir yog ntoo mos, uas txhais tau hais tias ntoo qhib tawv dua, txoj cai? Qhov laj thawj ntawd tsis siv rau txhua qhov piv txwv, tab sis qhov no, nws ua. Ntoo Oak Liab yog yuav luag ob zaug nyuaj li Douglas-fir ntoo, thiab ntoo ntoo dawb tseem nyuaj dua.
Puas Douglas fir suav tias yog ntoo mos?
Feem ntau, Douglas Fir yog hom ntoo softwood, tab sis nws kuj tau suav tias yog ib qho ntawm cov ntoo siv dav, tshwj xeeb tshaj yog hauv kev laj kab, kev tsim vaj tsev thiab decking. nyob rau hauv lub tebchaws United States. … Nws tseem yog lub npe hu ua cov ntoo tawv tawv tshaj plaws hauv Western thiab yooj yim rau pwm.
Puas Douglas zoo dua ntoo?
Pine muaj cov kab dav dav uas taug kev, ua rau nws tsis muaj zog dua li fir. Cov ntoo mos ntawm cov kab lis kev lag luam shrinks thiab nthuav, ua rau lub khob ntoo los yog twist. … Rau kev ruaj ntseg thiab lub zog, fir tsis tshua muaj kev sib tw los yog sib tw, thiab ntau zog dua ntoo thuv.
