Ntoo yog hygroscopic, yog li nws kho nws cov dej noo sab hauv kom haum rau sab nraud ntawm nws ib puag ncig. … Yog tsis muaj cov npoo ntxhib, dab tsi tau nkag mus rau hauv 2-los-4 planks ntawm cov ntoo ntxhib-sawn yog tam sim no tus nplaig-tripping 1.5-by-3.5, tau poob kwv yees li ¼-nti ntawm txhua sab rau cov txheej txheem ziab thiab ziab.
Vim li cas ntoo qhov loj tsis yog qhov loj?
Qhov "nominal" ntu qhov ntev ntawm ib daim ntoo, xws li 2 X 4 lossis 1 X 6, yog ib txwm loj dua qhov tseeb, lossis hnav, qhov ntev. Yog vim li cas yog uas hnav cov ntoo tau ntog lossis npaj du ntawm plaub sab (hu ua S4S) Kev ntsuas nominal yog ua ua ntej lub lumber yuav ntog.
Vim li cas ntoo thiaj ntsuas tau ib nrab?
Lawv xav tau ntoo uas yog smoother thiab saib zoo dua. Qhov no ua rau lumberjacks siv dav hlau kom du tawm qhov ntxhib-sawn nto ntawm ntoo. Nruab nrab ntawm qhov cub kom qhuav, uas tshem tawm cov dej noo ua rau cov ntoo shrinking, thiab npaj qhov chaw, qhov loj ntawm 2 × 4 xaus rau me dua li nws pib tawm.
Vim li cas 2x4 tau me dua?
Qhov laj thawj yooj yim yog vim li cas 2 × 4 tsis yog 2 ntiv tes los ntawm 4 ntiv yog cov ntoo mills luas tawm ntawm qhov ntxhib lossis tawv tawv ntawm 2 × 4 kom nws ua kom zoo dua thiab ua tiav. Los ntawm kev npaj cov ntoo ntawm tag nrho plaub sab, thawj 2 × 4 yog tam sim no txo mus rau 1 ½ ntiv tes los ntawm 3 1/2 ntiv tes.
Vim li cas 2x4 tsis ntsuas 2x4?
DIMENSIONAL LUMBER:
Yav tas los, thaum ib tsob ntoo hu ua 2x4 [los yog "ob-los-plaub"], nws ntsuas 2 ntiv tes los ntawm 4 ntiv tes. … Vim qhov kev milling ntxiv no, 2x4 tsis ntsuas tag nrho 2 ntiv tes los ntawm plaub ntiv tes. Hloov chaw, 2x4 tsuas yog 1 1/2 "los ntawm 3 1/2". Zoo li tus ntoo thuv.
