Polycarbonate U-shaped lock sheet

1. Product Overview

U-System Roof is manufactured with brand-new Covestro or SABIC polycarbonate raw materials without recycled materials. Its surface is coated with UV protective layer, offering a 10-year quality guarantee and extended service life. The unique U-lock splicing structure effectively offsets deformation caused by thermal expansion, making it ideal for large-span building canopies. It supports multiple color options, adjustable light transmittance, and delivers thermal insulation and sound insulation performance, widely applied to curved sunshades, parking sheds, factory roof daylighting and other architectural daylighting structures.

2. Product Specifications & Performance Parameters

The following theoretical data is for reference only:

Mold No.	Internal Structure	Thickness (mm)	Fixed Width	Customizable Length	Thermal Insulation Coefficient (W/㎡·K)	Sound Insulation (dB)	Minimum Bending Radius (mm)
1#	Double Wall	6 / 8 / 10	600mm	Yes	3.2 / 3.1 / 3.0	12 / 16 / 20	1200 / 1600 / 2000
2#	Four Walls	12 / 16	600mm	Yes	2.5 / 2.3	21 / 24	2400 / 3200
3#	Four Walls	8 / 10 / 12	600mm	Yes	2.7 / 2.6 / 2.5	17 / 21 / 21	1600 / 2000 / 2400
4#	Honeycomb Structure	8 / 10 / 12	600mm	Yes	2.7 / 2.6 / 2.5	17 / 21 / 21	1600 / 2000 / 2400

3. Purlin Spacing & Load Bearing Capacity

The table below shows the maximum allowable purlin span under different uniform surface loads:

Panel Thickness	Max Span under 75KG/㎡ Load	Max Span under 100KG/㎡ Load	Max Span under 125KG/㎡ Load	Max Span under 150KG/㎡ Load	Max Span under 175KG/㎡ Load	Max Span under 200KG/㎡ Load
6mm	0.95m	0.8m	0.65m	—	—	—
8mm	1.1m	0.95m	0.8m	0.7m	0.6m	0.5m
10mm	1.25m	1.1m	0.95m	0.85m	0.75m	0.65m
12mm	1.3m	1.15m	1m	0.9m	0.8m	0.7m
16mm	1.35m	1.2m	1.1m	1m	0.9m	0.8m

4. Complete Matching Accessories

Full sets of standardized supporting parts are provided for different panel thicknesses, covering profiles, fasteners, sealing and waterproof components:

Category	Model Specifications	Function Description
PC U-shaped Lock Profiles	AC101, AC102, AC608~AC712	Splice lock for panel side connection
Plastic Auxiliary Profiles	AC201, AC202	Edge trimming & sealing decoration
Stainless Steel Fasteners	AC308/310/312, AC406~416	Fixed clamping between panels and purlins
Self-tapping & Waterproof Screws	AC501, AC502	Overall fixing of plates and keels
Aluminum Waterproof Tape	AC901	Seal the hollow end of panels to block dust and water
Aluminum Alloy Edge Profiles	AC816	Edge finishing for 16mm thick panels

5. Standard Installation Steps

Cut four corner slots of panels to reserve expansion gaps for U-shaped profiles;
Tear off bottom protective film and stick aluminum breathable tape on both hollow ends;
Mount U-shaped lock profiles at two ends of each panel;
Fix the edge of the first panel to purlins with waterproof screws;
Place stainless steel fasteners on the purlin between adjacent panels;
Tighten screws to lock metal fasteners;
Align and install the second panel into the fastener clamping position;
Tap pressure strips to complete interlocking splicing of two panels;
Mount plastic end caps on both ends to seal the hollow channels;
Remove surface protective film to finish construction.

Perimeter Fixed Structure Composition

The canopy edge fixing system consists of four core parts: self-tapping screw, waterproof rubber gasket, U-shaped locking plate and steel purlin. The panel width is fixed at 0.6m, with fasteners evenly arranged around the perimeter and horizontal purlins for uniform load dispersion, ensuring overall stability and waterproof performance.

6. Application Scenarios

U-System Roof is widely used for large-span curved canopy, parking sunshade, factory daylighting roof, walkway skylight, commercial building facade daylighting and outdoor leisure pavilion roofing. Its flexible bending performance adapts to various curved modeling demands, while the U-lock connection avoids water leakage and thermal expansion cracking risks, meeting long-term outdoor use requirements.