H-shaklli uglerodli po'lat, H-nur, shuningdek, I-beam, Weam ("keng gardish" degan ma'noni anglatadi), Universal Beam (UB), Rolled Steel Hoist (RSJ) yoki Double T (ayniqsa, polyak, bolgar, ispan, italyan va nemis tillarida) I{{}} yoki H{{3} shaklidagi nurlardir. kesmalar-. "I" ning gorizontal elementi gardish, vertikal element esa "veb" deb ataladi. H-nurlar odatda konstruktiv po‘latdan tayyorlanadi va qurilish va qurilishda qo‘llaniladi. To'r kesish kuchiga qarshilik ko'rsatadi, gardish esa nurning eng ko'p egilish momentlariga qarshilik ko'rsatadi. Nurlar nazariyasi shuni ko'rsatadiki, I-bo'lim tarmoq tekisligida ham egilish, ham kesish yuklarini ko'tara oladigan juda samarali shakldir. Boshqa tomondan, kesma-ko'ndalang yo'nalishda pasaytirilgan yuk ko'tarish qobiliyatiga ega va yuk ko'taruvchi{15}}burilishda samarasiz bo'lib, ular uchun ko'pincha ichi bo'sh konstruktiv kesmalar afzalroqdir.
Ilova:
D H-nurlari qurilish sanoatida keng qo'llaniladi va turli xil standart o'lchamlarda mavjud.
D Tegishli po'lat I-nurni osongina tanlash imkonini beruvchi jadvallar mavjud
D Berilgan qo'llaniladigan yuk uchun o'lcham. I-nurlardan ham nurlar, ham ustunlar sifatida foydalanish mumkin.
D I-nurlar o'z-o'zidan yoki boshqa material bilan birlashtirilgan holda ishlatilishi mumkin,
D Odatda beton. Dizayn quyidagi mezonlardan biri bilan boshqarilishi mumkin.
| Nominal | H×B | T1(mm) | T2(mm) | JIS vazni | GB Og'irligi | Mavjud |
| Hajmi (mm) | (mm) | (kg/m) | (kg/m) | Uzunlik | ||
| 100×100 | 100×100 | 6 | 8 | 16.9 | 17.2 | 6-12m |
| 120×120 | 125×125 | 6.5 | 9 | 23.6 | 23.8 | 6-12m |
| 150×75 | 150×75 | 5 | 7 | 14 | 14.3 | 6-12m |
| 150×100 | 148×100 | 6 | 9 | 20.7 | 21.4 | 6-12m |
| 150×150 | 150×150 | 7 | 10 | 31.1 | 31.9 | 6-12m |
| 175×90 | 175×90 | 5 | 8 | 18 | 18.2 | 6-12m |
| 175×175 | 175×175 | 7.5 | 11 | 40.4 | 40.4 | 6-12m |
| 194×150 | 194×150 | 6 | 9 | 29.9 | 31.2 | 6-12m |
| 200×100 | 198×99 | 4.5 | 7 | 17.8 | 18.5 | 6-12m |
| 200×100 | 5.5 | 8 | 20.9 | 21.7 | 6-12m | |
| 200×200 | 200×200 | 8 | 12 | 49.9 | 50.5 | 6-12m |
| 200×204 | 12 | 12 | 56.2 | 56.7 | 6-12m | |
| 250×125 | 248×124 | 5 | 8 | 25.1 | 25.8 | 6-12m |
| 250×125 | 6 | 9 | 29 | 29.7 | 6-12m | |
| 250×175 | 244×175 | 7 | 11 | 43.6 | 44.1 | 6-12m |
| 300×150 | 298×149 | 5.5 | 8 | 32 | 32.6 | 6-12m |
| 300×150 | 6.5 | 9 | 36.7 | 37.3 | 6-12m | |
| 300×200 | 294×200 | 8 | 12 | 55.8 | 57.3 | 6-12m |
| 298×201 | 9 | 14 | 65.4 | 6-12m | ||
| 350×175 | 346×174 | 6 | 9 | 41.2 | 41.8 | 6-12m |
| 350×175 | 7 | 11 | 49.4 | 50 | 6-12m | |
| 400×200 | 396×199 | 7 | 11 | 56.1 | 56.7 | 6-12m |
| 400×200 | 8 | 13 | 65.4 | 66 | 6-12m | |
| 250×250 | 250×250 | 9 | 14 | 71.8 | 72.4 | 6-12m |
| 250×255 | 14 | 14 | 81.6 | 82.2 | 6-12m | |
| 300×300 | 300×300 | 10 | 15 | 93 | 94.5 | 6-12m |
| 294×302 | 12 | 12 | 83.4 | 85 | 6-12m | |
| 300×305 | 15 | 15 | 105 | 106 | 6-12m | |
| 350×350 | 344×348 | 10 | 16 | 113 | 115 | 6-12m |
| 350×350 | 12 | 1 | 135 | 137 | 6-12m | |
| 400×400 | 388×402 | 15 | 15 | 140 | 141 | 6-12m |
| 394×398 | 11 | 18 | 147 | 147 | 6-12m | |
| 400×400 | 13 | 21 | 172 | 172 | 6-12m | |
| 400×408 | 21 | 21 | 197 | 197 | 6-12m | |
| 414×405 | 18 | 28 | 232 | 233 | 6-12m | |
| 428×407 | 20 | 35 | 283 | 284 | 6-12m | |
| 350×250 | 340×250 | 9 | 14 | 78.1 | 79.7 | 6-12m |
| 400×300 | 390×300 | 10 | 16 | 105 | 107 | 6-12m |
| 450×300 | 440×300 | 11 | 18 | 121 | 124 | 6-12m |
| 450×200 | 446×199 | 8 | 12 | 65.1 | 66.7 | 6-12m |
| 450×200 | 9 | 14 | 74.9 | 76.5 | 6-12m | |
| 500×300 | 482×300 | 11 | 15 | 111 | 115 | 6-12m |
| 488×300 | 11 | 18 | 125 | 129 | 6-12m | |
| 500×200 | 496×199 | 9 | 14 | 77.9 | 79.5 | 6-12m |
| 500×200 | 10 | 16 | 88.2 | 89.6 | 6-12m | |
| 506×201 | 11 | 19 | 102 | 103 | 6-12m | |
| 600×200 | 600×200 | 11 | 17 | 103.4 | 106 | 6-12m |
| 596×199 | 10 | 15 | 92.4 | 95.1 | 6-12m | |
| 606×201 | 12 | 20 | 118 | 120 | 6-12m | |
| 600×300 | 582×300 | 12 | 17 | 133 | 137 | 6-12m |
| 588×300 | 12 | 20 | 147 | 151 | 6-12m | |
| 594×302 | 14 | 23 | 170 | 175 | 6-12m | |
| 700×300 | 692×300 | 13 | 20 | 163 | 166 | 6-12m |
| 700×300 | 13 | 24 | 182 | 185 | 6-12m | |
| 800×300 | 800×300 | 14 | 26 | 207 | 210 | 6-12m |
| 808×302 | 16 | 30 | 241 | 6-12m | ||
| 900×300 | 890×299 | 15 | 23 | 210 | 213 | 6-12m |
| 900×300 | 16 | 28 | 240 | 243 | 6-12m | |
| 912×302 | 18 | 34 | 283 | 286 | 6-12m |
