

This page answers a recurring sales failure mode: treating a box / square gutter inquiry as if the rain-gutter or half-round datasheet already covers it. In the documented pack, box gutter is a real product category (profile drawing + forming video), yet complete machine ratings are missing. Therefore public encyclopedia and CMS answers must demand a separate technical proposal instead of inventing numbers.
Industry box-gutter builders likewise start from customer drawings (width, leg height, material, gauge) before locking stations, kW, and speed. That commercial practice matches the blocked status here.
Correct handling: keep the category page visible as a category page, keep this page as the policy page, and only unlock numeric bands after a named proposal is filed against the customer drawing.
| Topic | Status |
|---|---|
| Product category (box / square eaves trough) | Confirmed — drawing + video |
| Forming speed | Blocked — do not invent |
| Main / hydraulic kW | Blocked |
| Pass count / shaft / envelope / mass | Blocked — drawing ≠ host spec sheet |
| Thickness band | Blocked |
| Line BOM | Blocked |
| Minimum inputs for a proposal | Finished profile drawing, material & gauge target, required length accuracy, voltage, whether plant or portable duty is expected |
Market pages may show portable 7-inch box machines or plant lines with their own bands. Cite them only as industry context — never as ZTRFM box ratings on this entry.
Forbidden fill sources (explicit): rain-gutter FAQ, half-round FAQ, downpipe YX/English FAQs, and unlabeled competitor datasheets. Allowed fill source: a ZTRFM technical proposal that names the box profile drawing.
Because this encyclopedia only publishes documented FAQ ratings. Market figures are unlabeled third-party proposals.
No. Video proves the category exists; it does not quantify m/min or kW.
Confirm box profile from the drawing, state that host ratings need a named technical proposal, and refuse rain/half-round substitution.
Into the contract and a revised encyclopedia revision — not into silent edits of the rain-gutter page.
Final ratings follow the confirmed technical proposal. Price and lead time are out of scope.