ᐅ Roll-up door vs sectional door vs side-hinged sectional door – issue with building height…
Created on: 20 Jun 2021 21:27
O
OlivieroGood morning,
I am currently building a garage; the foundation slab is already finished, and I have agreed on a door solution:
Clear height of 2.13 m (7 ft) and clear width of 5.00 m (16 ft 5 in), sectional door with window panel. Length is 11 meters (36 ft). Since it is a secondary storage garage, I want the building to be as low as possible. I estimate a minimum height of 1.80 m (5 ft 11 in) at the rear (I am 1.87 m (6 ft 2 in), so that should work). The roof is a panel roof resting on 220 mm (8.7 in) I-beams (a building regulation, which I cannot change).
Now, today I realized a problem with calculating the wall heights:
The first I-beam is located at 2.20 m (7 ft 3 in), where the door will be hung. Logically, it needs to be that far above the floor:
Door height 2.15 m (7 ft 1 in) + 0.15 m (6 in) lintel clearance (quite optimistic) = 2.30 m (7 ft 7 in), plus about 15 cm (6 in) due to the roof slope at the door, resulting in a height there of about 2.45 m (8 ft).
Adding the I-beam thickness of 0.22 m (8.7 in) gives an interior height of 2.67 m (8 ft 9 in). Then the panel roof adds about 10 cm (4 in), bringing it close to 2.80 m (9 ft 2 in). Adding the required fire protection clearance of 15 cm (6 in) brings the total almost to the maximum permitted building height of 3.00 m (9 ft 10 in)… my originally intended and planned overall height is well below that at 2.60 m (8 ft 6 in). That's unfortunate.
Alternative 1: (actually optimizing the current situation) – maybe the angle of the sectional door track does not need to be mounted at 90°, but at, for example, 80° or less, which would save some building height. The door itself would not mind; the track would have to be available in different angles, bending it would be difficult. This would be the simplest solution.
Alternative 2: Side-hinged sectional door, which might only save a few centimeters at the lintel and no more. Also, I would still need to pass under the I-beam with the side-hinged door, and also under a second beam behind that, so probably not a viable option.
Alternative 3: Rolling door. Initially ruled out because I want a window panel, as I am only allowed windows on two sides, and one of the long sides faces a carport. Window panels are possible with roll-up doors but are more difficult and expensive. Still, it could be an option.
Am I missing something here?
What solutions might still be reasonable given these conditions?
Thank you very much,
Best regards,
Oliver
I am currently building a garage; the foundation slab is already finished, and I have agreed on a door solution:
Clear height of 2.13 m (7 ft) and clear width of 5.00 m (16 ft 5 in), sectional door with window panel. Length is 11 meters (36 ft). Since it is a secondary storage garage, I want the building to be as low as possible. I estimate a minimum height of 1.80 m (5 ft 11 in) at the rear (I am 1.87 m (6 ft 2 in), so that should work). The roof is a panel roof resting on 220 mm (8.7 in) I-beams (a building regulation, which I cannot change).
Now, today I realized a problem with calculating the wall heights:
The first I-beam is located at 2.20 m (7 ft 3 in), where the door will be hung. Logically, it needs to be that far above the floor:
Door height 2.15 m (7 ft 1 in) + 0.15 m (6 in) lintel clearance (quite optimistic) = 2.30 m (7 ft 7 in), plus about 15 cm (6 in) due to the roof slope at the door, resulting in a height there of about 2.45 m (8 ft).
Adding the I-beam thickness of 0.22 m (8.7 in) gives an interior height of 2.67 m (8 ft 9 in). Then the panel roof adds about 10 cm (4 in), bringing it close to 2.80 m (9 ft 2 in). Adding the required fire protection clearance of 15 cm (6 in) brings the total almost to the maximum permitted building height of 3.00 m (9 ft 10 in)… my originally intended and planned overall height is well below that at 2.60 m (8 ft 6 in). That's unfortunate.
Alternative 1: (actually optimizing the current situation) – maybe the angle of the sectional door track does not need to be mounted at 90°, but at, for example, 80° or less, which would save some building height. The door itself would not mind; the track would have to be available in different angles, bending it would be difficult. This would be the simplest solution.
Alternative 2: Side-hinged sectional door, which might only save a few centimeters at the lintel and no more. Also, I would still need to pass under the I-beam with the side-hinged door, and also under a second beam behind that, so probably not a viable option.
Alternative 3: Rolling door. Initially ruled out because I want a window panel, as I am only allowed windows on two sides, and one of the long sides faces a carport. Window panels are possible with roll-up doors but are more difficult and expensive. Still, it could be an option.
Am I missing something here?
What solutions might still be reasonable given these conditions?
Thank you very much,
Best regards,
Oliver