Im in the process of self building a double garage which measures 22 feet (length) x 17 feet wide approx.
The plans state I have to use 220x75 C16 joists at 400 mm gaps.
Everyone I know (who knows a little about building today) thinks this is major overkill and I would be able to use 180mm x 50 and at 600mm gaps.
Please can anyone offer advice on what would be a sensible (safe) level as 220x75 at 400mm gaps seems to be very expensive!
Also can anyone tell me what the recommended run off would be for a 17 feet flat roof. Thanks.
The plans state I have to use 220x75 C16 joists at 400 mm gaps.
Everyone I know (who knows a little about building today) thinks this is major overkill and I would be able to use 180mm x 50 and at 600mm gaps.
Please can anyone offer advice on what would be a sensible (safe) level as 220x75 at 400mm gaps seems to be very expensive!
Also can anyone tell me what the recommended run off would be for a 17 feet flat roof. Thanks.