Hauv engineering, ntoo av, thiab kev tsim kho, cov ntsia hlau xa mus rau taw qhia tawv hlau (feem ntau yog hlau) uas siv los kho ntoo thiab lwm yam khoom. Lub rauj nailed tus ntsia thawv rau hauv lub nruas, thiab tsis ntev los no muaj tshwm sim ntawm rab phom thiab ntsia hlau phom. Vim tias cov ntsia hlau khov kho cov khoom, lawv hooked rau lawv los ntawm lawv tus kheej deformation thiab vam khom rau kev sib txhuam. Cov ntsia hlau muaj ntau daim duab vim lawv siv ntau yam. Cov nails tshaj plaws yog hu ua "xaim tes." Ntxiv rau feem ntau cov npe nail, muaj tack tes. Cov khoom siv thawv ntub ntoo qhuav rau peb kom paub txog cov ntsia hlau:
Nws zoo sib xws nyob rau hauv cov duab rau ntsia hlau, nrog lub taub hau me ntsis thicker. Txawm li cas los xij, cement rau tes ua los ntawm cov tshuab muaj hlau zoo thiab muaj qhov zoo ntawm kev ruaj khov thiab dabtsi yog khoov. Lawv tuaj yeem ncaj qha mus rau hauv cov pob zeb thiab cov phab ntsa. Cov lus qhia ntau yog 7 ~ 35 hli. Kuj hu ua ntoo screws. Nws yooj yim dua nrog cov ntoo dua lwm cov rau tes, thiab feem ntau yog siv ua ke nrog hlau thiab lwm yam ntaub ntawv nrog ntoo khoom.
Lub cev zoo li ib lub pas ntoo, nws lub taub hau kheej kheej thiab sib tiaj, crosses los yog ib lub taub hau, thiab nws cov hauv qab yog qhov tob hauv qab. Ntsia lub zog yog tshwj xeeb muaj zog. Muaj feem xyuam rau qee qhov chaw uas yuav tsum tau muaj zog nailing quab yuam, xws li cov lais xees, cov vov tsev ntoo, thiab lwm yam. Ntau hom kev ua ntawm 50 mus txog 85mm ntau qhov ntau thiab tsawg. Nws yog ib tug ntsia hlau nrog ob qho taw qhia xaus thiab ib qhov chaw hauv nruab nrab hauv nruab nrab. Cov rau tes yog yooj yim dua ua ke thiab txhim kho cov ntoo tshaj lwm cov tes, thiab yog tsim nyog rau kev siv li dowels thaum cov laug cam sib koom ua ke. Cov lus qhia ntau yog 25 mus txog 120 hli. Lub plhaub lub cev yog tob, muaj zog dua, thiab pheej yig dua. Nws tuaj yeem ua ke dua ob qho chaw sib ntxiv dua lwm cov tes. Feem ntau yog siv rau kev sib txuas thiab kev kho ntawm cov khoom hlau, xws li kev tsim cov khoom txhuas txhuas qhov rais thiab qhov rais. Cov duab zoo li cov xis mas, tab sis nws yog ib rab phom. Hauv kev sib piv, ntsia thawv txuas ntxiv zoo dua thiab pheej yig dua kev siv kev tsim kho. Nyob rau tib lub sij hawm ntau yooj yim dua lwm tus ntsia thawv siv. Tua cov rau tes feem ntau yog siv hauv kev siv cov ntoo ua haujlwm, xws li cov nplua ntoo zoo thiab ntoo ntaum ntoo.
Ntawm chav kawm, pinggood muaj tag nrho cov hom screws ntub dej, txais tos mus nrhiav Google rau cov khoom pinggood.
Lub bolts feem ntau siv nyob rau hauv qhov kev tsim kho dua tshiab yog muab faib ua yas thiab hlau, uas yog siv los hloov cov txheej txheem ntawm txoj hlua. Muaj feem xyuam rau txhua hom phab ntsa, av npoo av hauv tsev thiab cov khoom. Ncaj nawj siv: kev ua kom zoo nkauj, plywood, slatted. Cov rooj tog ntoo ntawm lub rooj tsim khoom lag luam yog kos nrog cov ntsia hlau ncaj.