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Views: 0 Author: Site Editor Publish Time: 2026-10-30 Origin: Site
An industrial sectional door, also called an overhead or lift door, is made of horizontal insulated panels hinged together that run vertically on side tracks and park under the ceiling. It suits warehouses, factories, logistics centres and loading bays. LESHO lists an Industrial Automatic Insulated Sectional Door on leshochina.com.
Industrial sectional panels are typically double-skin galvanized steel sandwich panels with polyurethane (PU) foam core, commonly around 40–80 mm thick. Aluminum-framed glazed sections can be added for daylight. LESHO industrial sectional panels use 0.4+0.4 mm PPGI skins with PU/PIR core at 45 kg/m³ (B1); common panel thicknesses in catalog include 42, 50 and 75 mm (75 mm listed for rooms about 0 to −20 °C).
Insulation depends on panel thickness and seals. Typical 40 mm PU panels achieve panel U-values around 0.5 W/m²K, while installed whole-door values are higher because of seals and frame. Thermal transmittance is tested per EN 13241 using EN 12428. LESHO catalog panel U-values: 42 mm 0.51, 50 mm 0.4, 75 mm 0.30 W/(m²K); whole-door example 5×5 m: 42 mm 1.0, 75 mm 0.55 W/(m²K).
Common track options are standard lift (for limited headroom above the opening), high lift and vertical lift (for tall buildings or overhead cranes), and low-headroom lift. The choice depends on headroom, ceiling obstructions and lighting. LESHO track / lift configuration is confirmed per opening from headroom and side room (standard, high, vertical or low-headroom as required).
In the EU, industrial doors are covered by EN 13241 and CE marking, with safety in use per EN 12453, wind resistance classes per EN 12424 and air permeability per EN 12426. In North America, buyers often reference DASMA standards and local building codes. LESHO catalogs list CE and ISO 9001; current certificate files are available from sales on request.
Yes. Sectional doors can usually include acrylic or glass vision windows, full-view aluminum sections, and a wicket (pass) door built into the panels so staff can enter without opening the whole door. LESHO catalog lists vision options and a wicket (pass) door among sectional accessories; confirm size and hardware per project.
Smaller doors can be balanced with torsion springs for manual push-up or chain-hoist operation. Most industrial doors use an electric shaft-mounted operator with control box, photocells and a safety edge, plus manual override for power failure. LESHO sectional doors are offered with electric operation (about 0.3 m/s), chain manual override, anti-fall and spring-break devices; motor brand is confirmed on the quotation.
Torsion springs are usually rated by cycle count; standard springs are commonly specified at around 15,000–25,000 cycles, with high-cycle springs available for heavy traffic. Spring life is a key maintenance item. LESHO catalog lists about 30 years service life for industrial sectional doors; torsion-spring cycle class is confirmed on the quotation for your traffic level.
Provide opening width and height, headroom and side room, lift type, panel color and thickness, windows or pass door, wind load requirements, operation method and voltage. Contact LESHO at info@leshochina.com or +86-15851675955. Normal lead time 15–20 days; standard warranty 1 year. Order quantity is confirmed per project.
