Aluminum Door Threshold and Accessible Sill Profiles
Aluminum door threshold and accessible sill profiles for barrier-free design and weathertight sealing.
Product Overview
The door threshold is one of those building components that most people never think about — until it causes a problem. A threshold that's too high creates a trip hazard. A threshold that doesn't drain properly allows water to pool inside the door frame. A threshold that doesn't seal properly allows cold air, insects, and noise to enter. Getting the threshold right is a detail that separates a well-designed building from one that causes daily frustration for its occupants.
Accessibility is an increasingly important consideration in threshold design. Building codes in Vietnam, Thailand, and Indonesia are progressively adopting accessibility requirements that limit the maximum threshold height for public buildings. ISO 21542 (Building construction — Accessibility and usability of the built environment) recommends a maximum threshold height of 20mm for accessible routes, with a preferred height of 0mm (flush threshold). Our accessible threshold profiles are designed to meet these requirements while still providing weathertight sealing.
The flush threshold is the most challenging to design because it must prevent water ingress without any physical barrier. Our flush threshold profiles use a combination of a drainage channel (to collect and drain water that reaches the threshold) and a brush pile seal (to prevent water from being blown under the door by wind pressure). This system has been tested to Class 3 water tightness per GB/T 7106, which means it can withstand 300 Pa wind pressure with 2 liters/m²/min rainfall without water ingress.
For commercial entrances with heavy traffic, we supply heavy-duty threshold profiles in 6061-T6 alloy with a minimum wall thickness of 3mm. These profiles are designed to withstand the repeated impact loads of shopping carts, delivery trolleys, and high-heel shoes without deforming. The surface is hard anodized (AA25) for maximum wear resistance.
Technical Specifications
| Alloy / Temper | AA 6063-T5 / 6061-T6 (heavy-duty) |
|---|---|
| Threshold Height | 0 mm (flush) / 10 mm / 20 mm |
| Width Range | 60 mm – 200 mm |
| Water Tightness | Class 3 per GB/T 7106 |
| Accessibility | Compliant with ISO 21542 |
| Heavy-Duty Version | 6061-T6, 3mm min wall, AA25 anodize |
System Interfaces, Fabrication and Delivery Controls
Architectural profiles must be bought as an interacting system. Frame, sash, glazing bead, gaskets, hardware, drainage and finish need to be checked together rather than ordered as isolated section shapes.
Information for an Accurate Inquiry
- System section and assembly drawing
- Glass / gasket / hardware schedule
- Profile and accessory BOM
- Finish / colour / cosmetic face requirements
- Cutting, packing, destination and acceptance records
Related Engineering Guides
- Aluminum Window Profile Systems: Components and Interfaces — Map frame, sash, beads and hardware before ordering.
- Glass Thickness and Glazing Bead Compatibility — Validate the glazing stack against the system.
- Window Drainage and Weather Seals — Review fabrication and assembly interfaces.
- Ordering Aluminum Window Profile Sets — Control BOM, accessories and packaging.
Request a Technical Quote
For drawings, MTRs, samples, pricing, and lead time, contact Andy: WhatsApp +86 151 1618 3980 or lkvicky2003@gmail.com. Please include profile reference, alloy/temper, surface finish, quantity, and destination port.