Khetho ea maballo a H e tlameha ho qala ka ho ipapisa le litšoaneleho tse tharo tsa mantlha tse ke keng tsa buisanoa, kaha tsena li amana ka kotloloho le hore na sehlahisoa se ka fihlela litlhoko tsa moralo oa sebopeho.
Kereiti ea lintho tse bonahalang: Lisebelisoa tse atileng haholo bakeng sa maballo a H ke tšepe ea sebopeho sa carbon (joalo kaQ235B, Q355B H Beamka litekanyetso tsa Sechaena, kapaA36, A572 H Beamka litekanyetso tsa Amerika) le tšepe e tlaase ea alloy e matla haholo. Q235B/A36 H Beam e loketse kaho ea sechaba ka kakaretso (mohlala, meaho ea bolulo, lifeme tse nyane) ka lebaka la ho cheseha ha eona hantle le litšenyehelo tse tlase; Q355B/A572, e nang le matla a ho hlahisa chai e phahameng (≥355MPa) le matla a tsitsitseng, e ratoa bakeng sa merero e boima e kang marokho, lithupelo tse kholo, le li-cores tse phahameng tsa mohaho, kaha li ka fokotsa boholo ba sepakapaka le ho boloka sebaka.
Litlhaloso tsa Dimensional: Mabala a H a hlalosoa ka litekanyo tse tharo tsa bohlokoa: bophahamo (H), bophara (B), le botenya ba websaete (d). Ka mohlala, lebone la H le ngotsoeng "H300×150×6×8"Ho bolela hore e na le bolelele ba 300mm, bophara ba 150mm, botenya ba marang-rang ba 6mm, le botenya ba flange ba 8mm. Lifate tse nyenyane tsa H (H≤200mm) li atisa ho sebelisoa bakeng sa mehaho ea bobeli e kang li-joists tsa fatše le li-partition supports; tse boholo bo bohareng (200mm＜H＜H (200mm＜H)) meaho e meholo ea fektheri e sebelisoa ho ea ho li-400mm tse kholo. Lithako tsa H (H≥400mm) li bohlokoa haholo bakeng sa marokho a phahameng haholo, a malelele, le sethala sa lisebelisoa tsa indasteri.
Ts'ebetso ea Mechini: Tsepamisa maikutlo ho matšoao a joalo ka matla a ho kotuloa, matla a ho tsitsa, le ho ba le tšusumetso e matla. Bakeng sa merero e libakeng tse batang (mohlala, ka leboea ho China, Canada), marako a H a tlameha ho feta litekong tsa mocheso o tlase oa mocheso (joaloka -40℃ impact toughness ≥34J) ho qoba ho robeha ha brittle maemong a leqhoa; bakeng sa libaka tsa seismic, lihlahisoa tse nang le ductility e ntle (elongation ≥20%) li lokela ho khethoa ho matlafatsa khanyetso ea tšisinyeho ea lefatše.
