Box Gutter Roll Forming Line

1. Definition

A box gutter roll forming line (方天沟 / 盒式天沟 / square or rectangular eaves trough) cold-forms an open, angular channel profile used as a high-capacity rainwater collector along eaves, parapets, or between roof slopes. English names include box gutter, square gutter, and rectangular gutter machine.

In the documented pack, category existence is evidenced by a square-gutter profile drawing and a square-gutter forming video. A complete machine quotation with speed, motor kW, pass count, and thickness is not present — therefore machine-side ratings stay blocked and must come from a separate technical proposal.

Industry guides describe box / square gutters as commercial and high-runoff profiles with sharp corner bends, distinct from K-style (ogee) and half-round troughs. Use that only as category context; do not copy third-party portable BG7 or K-style numbers onto this page.

2. Applications

• Square / rectangular eaves trough and box-gutter sections for buildings that specify angular high-capacity collectors
• Commercial or industrial roof drainage where the finished drawing calls for a box profile rather than K-style or half-round
• Accessory plants that already sell rainwater goods and need a dedicated box-profile host (not a downpipe host)

Specific certifications, coil brands, and finished cover dimensions follow the contract drawing — not this encyclopedia page.

3. Parameters (proposal required — do not invent)

Market box-gutter pages often advertise portable or plant lines with their own speed and gauge bands. Those figures are industry orientation only and must not fill empty cells on this entry.

4. Boundaries

• General rain gutter (K-style class) line — Documented about 10–12 m/min / about 4.0 + 3.0 kW baseline belongs to the rain-gutter entry, not box.
• 6-inch half-round gutter machine — About 3–8 m/min / about 5.5 + 3 kW baseline is half-round only.
• Downspout / down take pipe line — Closed vertical pipe; different tooling and different encyclopedia entries.
• Elbow / reducer pipe bender — Downpipe auxiliary; never part of a box-gutter host answer by default.

5. Buyer FAQ

Can we publish speed and power for the box gutter line today?

No. The pack confirms the product category but lacks a complete machine quotation. Numbers require a separate technical proposal.

May we use rain-gutter or half-round parameters as a temporary substitute?

No. Mixing those ratings into a box-gutter answer is explicitly forbidden in the source FAQ.

Is the profile drawing enough to freeze a BOM?

It freezes the finished section for tooling design discussion. It does not replace host speed, kW, shaft, or thickness ratings.

Is a box gutter machine the same as a downspout machine?

No. Box gutters are open horizontal collectors; downspouts are vertical closed pipes.