Ua hoʻokuʻu ʻo ASTM i kahi maʻamau hou ma 2015 (ma hope o ka hoʻokuʻu ʻia ʻana o ka 2015 ASTM Volume 01.08) e hoʻohui nei i ʻeono mau kūlana bolting structural i kēia manawa ma lalo o kahi kikoʻī umbrella. ʻO ka maʻamau hou, ASTM F3125, ua kapa ʻia ʻo "Specification for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi (830 MPa) and150 ksi (1040 MPa) Minimum Tensile Strength, Inch and Metric Dimensions" ma muli o nā kūlana e kū nei:
• ʻO ASTM A325 a me ASTM A325M, nā kikoʻī no nā bolts i mālama ʻia me ka wela;
• ʻO ASTM A490 a me ASTM A490M, nā kikoʻī no ke kila kila i mālama ʻia i ka wela; a
• ʻO ASTM F1852 a me ASTM F2280, nā kikoʻī no nā hui bolt/nut/washer type "twist off" (ʻo kā mākou wehewehe ʻana i kēia mau mea ʻo "A325 Tru Tension" a me "A490 Tru Tension", kēlā me kēia)
Ua hoʻoponopono kēia hoʻohui ʻana i nā ʻokoʻa liʻiliʻi ma waena o nā maʻamau ʻeono a ʻae ʻia no ka hoʻohālikelike piha ʻana. E ʻae kēia i nā hoʻololi e hiki mai ana e hana ʻia ma waena o nā māka bolting structural a pau a hāʻawi i kahi kikoʻī no ka bolting structural bolting.
He liʻiliʻi nā hoʻololi maoli i nā bolts i hana ʻia i nā kūlana pākahi a i ʻole nā māka ma ka ASTM F3125 hou; Eia naʻe nā mea i makemake nui ʻia:
• ʻAʻole loaʻa ka ikaika haʻahaʻa haʻahaʻa a me ka ikaika paʻakikī o nā bol A325 i ʻoi aku ma mua o 1" (ʻo nā bol A325 āpau he 120 KSI kaha haʻahaʻa haʻahaʻa i hoʻohālikelike ʻia me 105 KSI liʻiliʻi>1" anawaena).
• ʻAʻohe koi hoʻāʻo hoʻololi no nā bolts A325 galvanized i loko o ke kino o ka maʻamau (aia kahi Annex i F3125 no ka hoʻāʻo ʻana i ka hiki ke hoʻololi i ke ʻano FHWA).
• Ua hoʻohui ʻia ka haʻawina overtapping no nā nati i hoʻohana ʻia me nā bolts i uhi ʻia i nā ʻōnaehana pena F1136/F1136M a i ʻole F2833 (Zinc/Aluminum).
Hoʻohui ʻia ka manawa kūpono e hoʻohana i nā māka me nā ana ʻokoʻa (e like me ke poʻo geometries i hoʻololi ʻia a i ʻole ka lōʻihi o ke kaula kūikawā) ma ke kāhea ʻana i ka Manaʻo Hoʻohui S2 a hoʻohui i kahi "S" i ka hopena o ka papa (e like me "A325S" a i ʻole "A490S").
E hoʻololi mākou i kā mākou wehewehe e hoʻokomo i kahi kuhikuhi i ka ASTM F3125 ma ka hana hou. E ʻoluʻolu e hoʻokaʻaʻike mai iā mākou inā he nīnau kāu a inā makemake ʻoe i kekahi ʻike hou aʻe. Mahalo
Ka manawa hoʻouna: Mei-23-2017