QHB lists 4 m projection from 4.5 m width. QHC lists a minimum of 4.55 m for the same projection, so a strict 4.5 m limit does not meet its table. The 50 mm difference matters.
Keep measurements in millimetres
Write 4500 mm and 4000 mm in the request, marking which is width and which is projection. Avoid rounding an installation opening to the nearest half metre when checking a minimum-width row.
Check the frame envelope
Ask whether the quoted width includes end caps and the full cassette. Show adjacent walls and pipes. Do not assume the required extra 50 mm can be taken from the bracket or fabric width.
Use a measured alternative
If the wall cannot take 4550 mm, discuss QHB or a reduced projection using the appropriate model table. Change the specification explicitly rather than approving a drawing that quietly changes the requested coverage.
Specifications behind this guide
QHB full-cassette awning
- Listed width range
- 2-6 m
- Listed projection range
- 1.5-4 m
| Projection (m) | Minimum width (m) |
|---|---|
| 1.5 | 2 |
| 2 | 2.5 |
| 2.5 | 3 |
| 3 | 3.5 |
| 3.5 | 4 |
| 4 | 4.5 |
A 4 m projection requires at least 4.5 m width. Arm lighting is optional; select fabric, manual or motorised operation, and mounting brackets with your order.
See model detailsQHC full-cassette awning
- Listed width range
- 2.05-7 m
- Listed projection range
- 1.5-4 m
- Cassette section
- 247 × 155 mm
- Arm wall thickness
- 3.5 mm
| Projection (m) | Minimum width (m) |
|---|---|
| 1.5 | 2.05 |
| 2 | 2.55 |
| 2.5 | 3.05 |
| 3 | 3.55 |
| 3.5 | 4.05 |
| 4 | 4.55 |
The 7 × 4 m configuration uses three arms and three wall brackets. Confirm LED colour temperature when ordering.
See model detailsBefore you approve the order
- Confirm model, overall width, projection and the drawing revision in one written order.
- Match mounting parts, fabric reference, finish and controls to the quotation; document any substitution.
- Agree delivery contents, site-work responsibilities, operating instructions and the service contact.