United States, melao ea meaho le litekanyetso tsa boenjiniere li na le litlhoko tse thata tsa ho sebetsa hantle ha matla le maemo a leholimo a meaho, ho kenyeletsoa matšoao a bohlokoa a ts'ebetso joalo ka boleng ba U, khatello ea moea le ho tiea ha metsi. Litekanyetso tsena li behiloe ke likhothaletso tse fapaneng tse kang American Society of Civil Engineers (ASCE) le International Building Code (IBC), hammoho le American Construction Code (ACC).
Boleng ba U, kapa coefficient ea ho fetisa mocheso, ke parameter ea bohlokoa bakeng sa ho lekanya ts'ebetso ea mocheso ea enfelopo ea mohaho. Ho ea ka ASHRAE Standard 90.1, litlhoko tsa boleng ba U-boleng ba meaho ea khoebo li fapana ho ea ka libaka tsa boemo ba leholimo; mohlala, marulelo a leholimo a batang a ka ba le boleng ba U tlase ho 0.019 W/m²-K. Meaho ea bolulo e na le litlhokahalo tsa boleng ba U ho latela IECC (Khoutu ea Machaba ea Paballo ea Matla), eo hangata e fapaneng ho tloha ho 0.24 ho isa ho 0.35 W/m²-K.
Maemo a tshireletso kgahlanong le kgatello ya moya e theilwe haholoholo hodima tekanyetso ya ASCE 7, e hlalosang lebelo la moya la motheo le kgatello ya moya e tsamaellanang eo moaho o tlamehang ho e mamella. Maemo ana a kgatello ya moya a laolwa ho itshetlehile hodima sebaka, bophahamo le tikoloho ya moaho ho netefatsa polokeho ya sebopeho sa moaho ka lebelo le feteletseng la moya.
Tekanyetso ea ho tiea ha metsi e tsepamisitse maikutlo holim'a ho tiea ha metsi meahong, haholo-holo libakeng tse nang le lipula tse matla le likhohola. IBC e fana ka mekhoa le litlhoko tsa tlhahlobo ea ho tiea ha metsi ho etsa bonnete ba hore libaka tse kang manonyeletso, lifensetere, mamati le marulelo li entsoe le ho hahuoa ho fihlela tekanyetso e boletsoeng ea ho thibela metsi.
Ka ho khetheha mohahong o mong le o mong, litlhoko tsa ts'ebetso tse kang boleng ba U, khatello ea moea le ho tiea ha metsi li tloaetse ho lumellana le maemo a leholimo a sebaka sa eona, tšebeliso ea mohaho le litšobotsi tsa oona tsa sebopeho. Litsebi tsa meralo ea meralo le lienjineri li tlameha ho latela melao ea meaho ea lehae, li sebelisa lipalo tse khethehileng le mekhoa ea liteko ho netefatsa hore meaho e fihlela litekanyetso tsena tse thata tsa ts'ebetso. Ka ho kenya ts'ebetsong ea mekhoa ena, mehaho ea United States ha e khone ho mamella likoluoa tsa tlhaho feela, empa hape e fokotsa tšebeliso ea matla ka katleho le ho finyella tsoelo-pele e tsitsitseng.
Nako ea poso: Aug-23-2024