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    K-Span Arch Building Machine (MIC240 Class)

    76August 6, 2026
    K-Span Arch Building Machine (MIC240 Class), arch building, roof panel, panel line, Reference configuration MIC240, Reference configuration, configuration MIC240, K-Span beamless arch building

    Table of Contents

    1. Definition
    2. Reference configuration
    3. Process sketch
    4. Boundaries
    5. Inquiry checklist
    6. Buyer FAQ
    7. References

    1. Definition

    A K-Span / beamless arch building machine (MIC240 class, often labeled 914–610) is an on-site roll-forming and curving unit for self-supporting steel arch panels. Coil is formed flat, cut to length, curved to arch radius, then optionally seamed. It is not a conventional ground-mounted roof/wall panel line and not a floor-deck machine.

    2. Reference configuration (MIC240)

    ItemCited reference
    Speeds (separate bands)Flat ~15 m/min; arch ~13 m/min; seam ~16 m/min — not one combined rating
    PowerTotal motors ~19.7 kW; main ~7.5; curving ~3.0 + 1.5×2; shear ~4.0; conical ~1.1+1.1
    WidthFeed ~914 mm → product ~610 mm (~66.7% utilization)
    Thickness~0.6–1.5 mm
    Forming~13+1 steps (incl. lead rubber roll); gear/sprocket drive
    Envelope / mass~8900×2230×2350 mm; ~10 t
    Span (cited)~5–40 m — depends on thickness and engineering; not an absolute guarantee
    Decoiler~10 t capacity; ID ~450–650 mm

    Conflict call-out: some draft summaries show thickness ~0.5–0.6 mm; MIC240 source evidence cites ~0.6–1.5 mm. Prefer the MIC240 technical parameter band and keep variants labeled. Larger 1250–800 class machines in the same pack may quote different total power — do not overwrite MIC240 with those figures.

    3. Process sketch

    1. Uncoil color / galvanized coil
    2. Roll form the flat corrugated panel
    3. Cut panel to length (footer-to-footer developed length)
    4. Curve / arch the cut panel to the design radius
    5. Seam (sew) adjacent arched panels into a continuous shell

    Full sequence detail lives on the K-Span process-flow page.

    4. Boundaries

    • Ordinary trapezoidal / standing-seam roof panel lines lack on-site arch + seam capability for beamless K-Span shells
    • Accessories on MIC240 quotes commonly include manual decoiler, sewing/seaming machine, brackets/legs — confirm per proposal
    • Do not publish one blended “line speed” from flat / arch / seam bands

    5. Inquiry checklist

    • Confirm MIC240 (914→610) vs larger width class
    • Thickness and design span (engineering, not brochure guarantee)
    • Whether sewing/seaming machine is in the package
    • Site power / mobility (trailer, generator) scope

    6. Buyer FAQ

    Factory-fixed or site-mobile?

    MIC240 class is designed as a site-capable arch building machine (often trailer-mounted in industry practice). Scope of mobility and generator follow the named proposal.

    Is seaming mandatory?

    MIC240 accessory lists include a sewing/seaming machine for assembling arched panels. Confirm whether seam is in the quoted package.

    Why three speed numbers?

    Flat forming, arch curving, and seaming are separate operations with separate cited bands (~15 / ~13 / ~16 m/min). Do not average them.

    Same as a roof panel line?

    No. Ordinary roof/wall panel mills do not include the on-site arch + seam path for beamless shells.

    Final ratings follow the named proposal. Price and lead time are out of scope.

    References

    1. 23-KSPAN-ARCH thematic FAQ (MIC240 parameters)
    2. Industry context: MIC240 K-span on-site forming overview
    Back to Industry Encyclopedia