MARKET 08 · SOUTHEAST ASIA
Vietnam: monsoon rain and a typhoon wind case in the centre and north.
A Vietnamese house needs drainage as much as ventilation, and in the typhoon belt the wind case governs the anchors and the bracing. The two requirements point at different parts of the frame.
In the typhoon belt the design question is not “will the frame survive” but “what happens to the cover”. A frame that holds while the film fails is a frame that then takes the load of a flapping sheet. Fixing detail and vent closure matter as much as section size.
| Item | Requirement | Effect |
|---|---|---|
| Wind | typhoon case, exposure | anchors, bracing, spacing |
| Cover | removable or reinforced fixing | clips / channel |
| Drainage | gutter capacity + fall | G 250 / G 300 |
| Humidity | vent area, anti-condensation | film grade |
| Coating | hot-dip at cut ends | inspection point |
Hai Phong serves the north, Cat Lai the south, Da Nang the centre. The container plan is the same but the inland leg differs; for the central provinces, 6 m lengths and a 20GP cut plan can be cheaper than 12 m and a 40HQ.
Cover fixing is a storm decision
Ask for the fixing method in writing: clips, channel, or both. A clip-only roof is the first thing to fail in a typhoon, and it takes the vent hardware with it.
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