Raws li Tuam Tshoj "kev faib tawm ntawm kev ua haujlwm ntawm cov ntaub ntawv hauv tsev thiab cov khoom lag luam" (GB 8624 {1} Cov ntaub ntawv yog tsis ua haujlwm. Qhov hluav taws kub ntsuas hluav taws xob ntawm boarding board yog nyob ntawm cov khoom siv:
{{0- Chav Board: Gypsum Board: Gypsum Board, thiab lwm yam {{{}}--} commustible). Piv txwv li, qee hom ntawm cov iav magnesium rov qab sim ua chav kawm A1 (siv: Lub Tsev Fireproof Cov ntaub ntawv zoo saib xyuas kev saib xyuas kev saib xyuas zoo thiab kuaj xyuas lub chaw kuaj xyuas cov kev saib xyuas zoo
{- tsis-}}} Cov tuab kawm ntawv b2 (sib txuas ntawm cov chav kawm backing:
