Cov txiv ntoo ntawm lub logyog cov khoom siv txuas uas txuas lub log rau lub qag ntawm lub tsheb. Lawv muaj ib lub qhov sab hauv uas tso cai rau lawv ntsia hlau rau ntawm lub tsheb cov studs thiab ruaj ntseg lub log rau hauv qhov chaw. Lawv muaj ntau qhov ntau thiab tsawg, cov duab, thiab cov qauv, nyob ntawm lub tsheb hom thiab qauv, thiab hom log.Lub loglub hnab nqa khoomcov ntsia hlau, ntawm qhov tod tes, zoo ib yam li cov txiv ntoo lug, tab sis es tsis txhob ntsia rau ntawm cov studs, lawv muaj qhov kawg threaded uas mus ncaj qha rau hauv lub log hub. Lawv kuj tuaj yeem muaj ntau qhov ntau thiab tsawg, cov duab, thiab cov qauv, nyob ntawm lub tsheb hom thiab qauv thiab hom log. Cov txiv ntoo lug thiab bolts ntawm lub log yog qhov tseem ceeb rau koj lub tsheb txoj kev nyab xeeb vim lawv tuav lub log rau hauv qhov chaw thiab tiv thaiv lawv kom tsis txhob xoob thaum tsav tsheb. Cov log xoob tuaj yeem ua rau muaj xwm txheej, puas tsuaj rau lub tsheb, thiab txawm tias ua rau tuag taus. Peb kuj tuaj yeem muab covtxiv laum kabYog li ntawd, nws yog ib qho tseem ceeb kom ntseeg tau tias cov txiv ntoo thiab cov bolts nyob rau hauv zoo mob thiab nruj kom raug.