1. Ib pawg tsav tsheb txoj kev
(1) Cov ntsiab lus tsim kho. Siv ib lossis ob daim ntawv hlau ua ib pawg, thiab pib tsav tsheb ib thooj (pab pawg) ib los ntawm ib qho pib ntawm ib lub ces kaum.
(2) Qhov zoo: Kev tsim kho yog yooj yim thiab tuaj yeem tsav tsis tu ncua. Tus neeg tsav tsheb pawg muaj kev taug kev luv luv thiab ceev ceev.
(3) Qhov tsis zoo: Thaum ib qho thaiv ib leeg tau tsav mus rau hauv, nws yog ib qho yooj yim rau qaij mus rau ib sab, tsub zuj zuj ntawm kev ua yuam kev yog qhov nyuaj los kho, thiab qhov ncaj ntawm phab ntsa yog qhov nyuaj rau kev tswj.

2. Ob txheej txheej purlin piling txoj kev
(1) Cov ntsiab lus tsim kho. Ua ntej, tsim ob txheej ntawm purlins ntawm ib qhov siab ntawm hauv av thiab ib qho kev ncua deb ntawm lub axis, thiab tom qab ntawd ntxig tag nrho cov ntawv pawg hauv cov purlins ua ntu zus. Tom qab plaub lub ces kaum raug kaw, maj mam tsav cov nplooj ntawv pawg los ntawm ib qho hauv ib kauj ruam mus rau qhov tsim kom siab.
(2) Qhov zoo: Nws tuaj yeem ua kom lub dav hlau loj, verticality, thiab flatness ntawm daim ntawv pawg phab ntsa.
(3) Qhov tsis zoo: Kev tsim kho yog qhov nyuaj thiab tsis yooj yim, thiab kev tsim kho qeeb. Cov pawg tshwj xeeb zoo li yuav tsum tau thaum kaw thiab kaw.

3. Txoj kev tshuaj ntsuam
(1) Cov ntsiab lus tsim kho. Siv 10 mus rau 20 steel ntawv pawg rau txhua txheej ib txheej purlin los ua ib qho kev tsim kho, uas tau muab tso rau hauv cov av mus rau qhov tob kom tsim ib phab ntsa luv luv. Rau txhua qhov kev tsim kho, thawj tsav 1 mus rau 2 steel ntawv pawg ntawm ob qho kawg, thiab nruj me ntsis tswj nws txoj kev ntsug, kho nws ntawm lub laj kab nrog hluav taws xob vuam, thiab tsav cov ntawv nruab nrab hauv cov kab sib txuas ntawm 1/2 lossis 1/3 ntawm qhov qhov siab ntawm daim ntawv piles.
(2) Qhov zoo: Nws tuaj yeem tiv thaiv kev qaij ntau dhau thiab sib tw ntawm daim ntawv pawg, txo qhov kev sib tw qaij yuam kev ntawm kev tsav tsheb, thiab ua tiav kaw. Txij li thaum tsav tsheb yog nqa tawm nyob rau hauv cov ntu, nws yuav tsis cuam tshuam rau kev tsim kho ntawm cov ntawv hlau uas nyob ib sab.