ʻO ka hao hao H - he hana hoʻokele waiwai hou. ʻO ke ʻano o ka ʻāpana o ka H beam he mea waiwai a kūpono hoʻi, a maikaʻi nā waiwai mechanical. Ke kaʻa ʻana, hoʻonui like ʻia kēlā me kēia kiko ma ka ʻāpana a liʻiliʻi ke koʻikoʻi o loko. Ke hoʻohālikelike ʻia me ka I-beam maʻamau, loaʻa i ka H beam nā mea maikaʻi o ka modulus ʻāpana nui, ke kaumaha māmā a me ka mālama metala, hiki ke hoʻemi i ka hoʻolālā hale e 30-40%. A no ka like o kona mau wāwae i loko a me waho, ʻo ka hope o ka wāwae he Angle kūpono, hui a hui pū ʻia i nā ʻāpana, hiki ke mālama i ka welding, hana riveting a hiki i 25%.
ʻO ke kila ʻāpana H he kila ʻāpana waiwai me nā waiwai mechanical ʻoi aku ka maikaʻi, i hoʻonui ʻia a hoʻomohala ʻia mai ke kila I-section. ʻO ka mea nui, ua like ka ʻāpana me ka leka "H"