8.8 10.9 12.9 ʻO nā kī ikaika kiʻekiʻe, ʻeleʻele nā kī hexagonal nui.
Hoʻohālikelike hana
| kiko kiko d | (M39) | M42 | (M45) | M48 | (M52) | M56 | M64 | |
| P | pitch | 4 | 4.5 | 4.5 | 5 | 5 | 5.5 | 6 |
| b | kuhikuhi | 68 | 74 | 76 | 82 | 85 | 90 | 100 |
| c | Min | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Max | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| da | Max | 45 | 48 | 52 | 55 | 60 | 64.2 | 73.2 |
| ds | nominal | 39 | 42 | 45 | 48 | 52 | 56 | 64 |
| Min | 38 | 41 | 44 | 47 | 51 | 54.8 | 62.8 | |
| Max | 40 | 43 | 46 | 49 | 53 | 57.2 | 65.2 | |
| dIn | Min | 60 | 64.7 | 69.45 | 74.2 | 78.8 | 83.4 | 92.9 |
| a | Min | 71.3 | 76.95 | 82.6 | 88.25 | 93.79 | 99.2 | 110.5 |
| k | nominal | 25 | 26 | 28 | 30 | 33 | 35 | 40 |
| Min | 23.95 | 24.95 | 26.95 | 28.95 | 31.75 | 33.75 | 38.75 | |
| Max | 26.05 | 27.05 | 29.05 | 31.05 | 34.25 | 36.25 | 41.25 | |
| k1 | Min | 16.76 | 17.46 | 18.86 | 20.26 | 22.23 | 23.63 | 27.13 |
| r | Min | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 |
| s | Max=nominal | 65 | 70 | 75 | 80 | 85 | 90 | 100 |
| Min | 63.1 | 68.1 | 73.1 | 78.1 | 83 | 87.8 | 97.8 | |
| Loko b | - | - | - | - | - | - | - | |
wehewehe hana
ʻO nā kī i hana ʻia me ke kila ikaika kiʻekiʻe a i ʻole ke koi ʻana i ka ikaika pre tightening koʻikoʻi hiki ke kapa ʻia he mau bolts ikaika kiʻekiʻe. Hoʻohana mau ʻia nā bolts ikaika kiʻekiʻe no ka hoʻopili ʻana i nā alahaka, nā ala hao, nā mea uila kiʻekiʻe a me nā mea uila kiʻekiʻe. ʻO ka haʻihaʻi ʻana o kēia ʻano bolt ka hapa nui o ka haʻihaʻi. ʻO nā bolts ikaika kiʻekiʻe i hoʻohana ʻia i nā mea hana kiʻekiʻe kiʻekiʻe e koi i ka prestressing nui e hōʻoia i ka sila ʻana o ka ipu.
ʻO kekahi mau manaʻo e pili ana i nā bolts ikaika kiʻekiʻe
E like me nā ʻōlelo o ka papa hana bolt ma 8.8 a i luna paha, i ʻike ʻia he mau bolts ikaika kiʻekiʻe. Ma Malaki 2020, ua helu wale ʻia ke kūlana aupuni o Kina i M68. No nā kikoʻī nui nui, ʻoi aku ka lōʻihi o ka bolt iā ia iho 10 ~ 15 mau manawa o nā bolts ikaika kiʻekiʻe, ʻaʻole i loaʻa nā huahana i hoʻopau ʻia, hiki ke hana ʻia kahi helu liʻiliʻi o nā mea hana hale ma Kina. [1-2] [3] ka ikaika kiʻekiʻe a me ka ʻokoʻa o ka bolt maʻamau: hiki i ka bolt ikaika kiʻekiʻe ke kū i ka ukana ma mua o ka kikoʻī like o ka bolt maʻamau e ʻoi aku ka nui. Hana ʻia nā mea o nā bolts maʻamau o Q235 (A3). ʻO ke kila ikaika kiʻekiʻe 35 # kila a i ʻole nā mea waiwai kiʻekiʻe, i hana ʻia ma hope o ka mālama ʻana i ka wela, hoʻomaikaʻi i ka ikaika.