Roof Deck Design Height Limit

From the typical 1 to 3 roof and composite floor deck to concrete form deck to long spanning deep deck profiles asc steel deck s extensive product offer meets the needs of the most complex conditions and demands for structural performance and design.

Roof deck design height limit.

2x10 to 15 feet and 2x12 to 18 feet. Load limits on the roof of a building. The larger the deck the larger the joists. 34 minimum stair rail height from nosing to top of rail.

50 lb concentrated load over 1 sqft or balusters. The dca6 recommends minimum 6x6 posts with a maximum 12 foot height. Good for short span conditions for use when metal deck is used as a leave in place form composite deck 3 inch depth 32 inch coverage 11 foot to 15 foot optimal span range pan perforated acustadek option available with smooth series rivet attachments or welded. If located on a corner lot the structure must be situated in the half of the lot furthest from the side street.

200 lb concentrated load. There is a height limitation of 15 feet. 50 lbf vertical and horizontal load along top rail. In typical deck construction with a ledger on one side of the joist and beam on the other the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above.

Roofs are under a lot of pressure. Internachi is more conservative in its recommendations which specify that posts should be no taller than 12 feet unless cross bracing is used between posts. If bracing is used a maximum post. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing.

If larger than 400 square feet it requires frost line footings. The code has some very specific requirements for deck stairs. If in one 100 year floodplain the structure must be firmly anchored. 36 minimum height when surface is 30 above grade.

A 2x8 up to 12 feet. 4 maximum gap between deck and underside of bottom rail.