Tere Whakaitie pā ana ki te rahinga o te karāhe e hiahiatia ana i muri i te tapahi i te karāhe i mua i te whakakanapa.
Ko te Tātai he karāhe kua tohua me te rahi e hiahiatia ana x te roa o te karāhe e hiahiatia ana x te whānui o te karāhe e hiahiatia ana / te roa o te rau karāhe mata / te whānui o te rau karāhe mata = te tere tapahi
Nō reira, me mārama tātou ki te rahi o te pepa karāhe mata me te maha o ngā mirimita (mm) e toe ana mō te roa me te whānui o te karāhe ina tapahia:
| Matotoru o te Karāhe (mm) | Rahi Pepa Karāhe Mata Paerewa (mm) | Me waiho te mirimita mō te karāhe kia whānui, kia whānui hoki (mm) |
| 0.25 | 1000×1200 | 0.1-0.3 |
| 0.4 | 1000×1500 | 0.1-0.3 |
| 0.55/0.7/1.1 | 1244.6×1092.2 | 0.1-0.3 |
| 1.0/1.1 | 1500×1900 | 0.1-0.5 |
| neke atu i te 2.0 | 1830×2440 | 0.5-1.0 |
| 3.0 me runga ake i te 3.0 | 1830×2400;2440×3660 | 0.5-1.0 |
Hei tauira:
| Rahi Karaehe e Hiahiatia ana | 454x131x4mm |
| Rahi Paerewa o te Pepa Karāhe Mata | 1836x2440mm; 2440x3660mm |
| Me waiho te mirimita mō te karāhe kia whānui, kia whānui hoki (mm) | 0.5mm mō ia taha |
| Rahi o te Pepa Karāhe Mata | 1830 | 2440 | 1830 | 2440 |
| Rahi karaihe e hiahiatia ana me te tāpiri mm ina tapahia | 454+0.5+0.5 | 131+0.5+0.5 | 131+0.5+0.5 | 454+0.5+0.5 |
| Te rahinga i muri i te pepa mata, wehea ki te rahi o te karāhe e hiahiatia ana | 4.02 | 18.48 | 13.86 | 5.36 |
| Te tapeke o te karaihe e tika ana | 4×18=72 ngā wahi | 13×5=65 ngā wahi | ||
| Tere Whakaiti | 72x454x131/1830/2440=95% | 65x454x131/1830/2440=80% | ||
| Rahi o te Pepa Karāhe Mata | 2240 | 3360 | 2240 | 3360 |
| Rahi karaihe e hiahiatia ana me te tāpiri mm ina tapahia | 454+0.5+0.5 | 131+0.5+0.5 | 131+0.5+0.5 | 454+0.5+0.5 |
| Te rahinga i muri i te pepa mata, wehea ki te rahi o te karāhe e hiahiatia ana | 4.92 | 25.45 | 16.97 | 7.38 |
| Te tapeke o te karaihe e tika ana | 4×25=100 ngā wahi | 16×7=112 ngā wahi | ||
| Tere Whakaiti | 100x454x131/2440/3660=66% | 112x454x131/2440/3660=75% | ||
Nō reira, i mōhio mātou ko te rau mata 1830x2440mm te mea tuatahi hei whiriwhiri māu ina tapahia.
Kei a koe tētahi whakaaro me pēhea te tatau i te tere tapahi?
Wā tuku: Whiringa-ā-rangi-01-2019