1. Cov duab sib txawv
1. Ntu ntu ntawm cov yeeb nkab puag ncig yog ncig. Qee zaum, nws yog qhov tsim nyog rau kev thauj mus los ntawm cov kua dej vim nws sab hauv yog du, tsis yooj yim rau cov av, thiab kuj yooj yim los ntxuav. Nws cov phab ntsa sab hauv tuaj yeem polished los ua kom cov dej thauj mus los smoother thiab txo qhov tsis kam. Lub zog nto ntawm cov yeeb nkab puag ncig yog qhov sib xws, tab sis nws yuav tsis ruaj khov li cov yeeb nkab square thaum kho tej yam khoom.
2. Ntu ntu ntawm cov yeeb nkab square yog square. Nws plaub lub ces kaum tsis yooj yim rau polish. Feem ntau ntawm cov phab ntsa sab nrauv yog txhuam kom txo tau qhov muaj khawb. Nws muaj kev ruaj ntseg dua thaum kho tej yam khoom thiab feem ntau siv rau hauv cov qauv uas yuav tsum tau muaj kev txhawb zog siab.
2. Muaj zog sib txawv
Tus ntoo khaub lig-sectional duab ntawm lub raj square yog lub kaum sab xis. Nws tuaj yeem faib tau zoo dua thiab xa cov quab yuam thaum muaj zog, yog li nws muaj zog dua dabtsi yog khoov thiab compressive zog.
Thaum cov yeeb nkab puag ncig yog nyob rau hauv quab yuam, vim nws lub voj voog hla ntu, qhov sib faib quab yuam ntau dua, yog li nws muaj kev ua haujlwm zoo dua los yog seismic.
3. Kev ua tau zoo ntawm kev tsim kho
Lub raj square muaj plaub lub kaum sab xis, uas yooj yim rau kev koom nrog lwm cov ntaub ntawv, xws li vuam, bolting, thiab lwm yam.
Round tubes yuav tsum tau ua cov txheej txheem ntxiv, xws li vuam lossis flaring, yog li lawv cov kev tsim kho yog qhov nyuaj dua.
4. Scope ntawm kev siv:
Square raj feem ntau yog siv rau kev txhawb nqa thiab kab teeb, kab, ncej thiab lwm qhov chaw ntawm lub tsev;
Round raj feem ntau yog siv los thauj cov kua, roj thiab cov kav dej thiab qhov chaw hauv ntau qhov chaw.