Thaum xaiv cov rooj zaum hauv tsev kawm ntawv, cov khoom siv zoo thiab kav ntev yuav tsum yog qhov tseem ceeb rau kev txiav txim siab. Lub rooj zaum thiab backrests yuav tsum yog ua los ntawm cov khoom ruaj khov, yooj yim - rau - cov ntaub ntawv huv si - xws li siab - yas, khoom ntoo, los yog cov khoom sib xyaw. Ob txhais ceg thiab kev txhawb nqa thav duab feem ntau yog tsim los ntawm cov hlau lossis cov ntoo uas muaj zog, muaj cov hmoov hmoov-coated los yog tiv thaiv-corrosive tiav kom ntseeg tau ntev - lub sij hawm durability. Xaiv cov rooj zaum ua los ntawm cov khoom siv txhim khu kev qha tsis tsuas yog txuas ntxiv lawv lub neej tab sis kuj txo cov nqi tu txhua hnub.
Ergonomic tsim thiab kev nplij siab kuj tseem ceeb heev. Lub rooj zaum qhov ntev-qhov siab, qhov dav, thiab qhov tob- yuav tsum ua raws li qhov sib piv ntawm lub cev ntawm cov tub ntxhais kawm hnub nyoog pawg; ib tug me ntsis reclined los yog nkhaus backrest muab kev txhawb nqa txha caj qaum, pab kom txo qis qaug zog los ntawm kev zaum ntev. Qee lub rooj zaum muaj qhov hloov tau yooj yim kom haum rau cov menyuam kawm ntawv uas muaj hnub nyoog sib txawv lossis qhov siab, yog li ua kom lub rooj zaum xis nyob. Kev nyab xeeb thiab ib puag ncig npaj yuav tsum raug coj mus rau hauv tus account. Cov rooj zaum yuav tsum ruaj khov thiab plam- tiv taus, nrog kev sib txuas ruaj ntseg thiab tsis muaj cov npoo ntse lossis cov ces kaum uas tuaj yeem ua rau raug mob. Rau cov chaw tshwj xeeb xws li chav kuaj lossis chav kawm sab nraum zoov, cov rooj zaum ua los ntawm corrosion-resistant, waterproof, hluav taws kub-retardant, los yog UV{10}}cov ntaub ntawv tiv taus yuav tsum tau xaiv. Thaum kawg, lub rooj zaum qhov hnyav thiab kev txav mus los yuav tsum sib npaug los pab txhawb kev hloov pauv hauv chav kawm thiab kev tswj hwm.