Roof Deck Design Height Limit Lowered Railing

50 lb concentrated load over 1 sqft or balusters.
Roof deck design height limit lowered railing. 50 lbf vertical and horizontal load along top rail. See code for other limitations e g number of stories and or floor area limits based on the buildable area of the lot aka floor area ratio. Additional documents may be available in some regions. A requirements for single family dwelling projects may be more restrictive as required by section 12 21a 17 of this code.
The irc requires guardrails to be at least 36 in height measured from the deck surface to the top of the rail. Decks without railing pictures ideas designs picture search filters any deck type ground level deck second story deck pool deck first story deck porch curved deck multi level deck roof deck. Although not specifically referenced in the irc dca 6 2015 the deck design guideline from the american wood council can be used to design a deck. 36 minimum height when surface is 30 above grade.
Deck guardrails guards should rise to at least 36 inches above the residential deck level. 200 lb concentrated load. On the surface this seems to line up with ibc and osha regulations but there is one crucial difference. 4 maximum gap between deck and underside of bottom rail.
Decks 24 to 5 10 180 cm need 36 guards and anything above 5 10 requires a 42 high railing. This is a minimum required height for residential structure higher guards are acceptable. If you choose to install a guardrail on a deck lower than 30 you must still meet code requirements. In the usa if your porch floor is less than 30 inches high from the ground a porch railing is not required by code.
Code nyc bc requires that all buildings greater than 22 feet tall with low slope roofs and terraces have a 42 inch tall parapet railing or fence. Decks attached to single family detached homes are regulated under the rules of the international residential code irc. 4 maximum gap between balusters. Respect minimum height requirements safety is important and something that should always supersede style.
Deck guardrail height. 34 minimum stair rail height from nosing to top of rail. Residential design advisory team rdat and do not require a pre application meeting or section 311 neighborhood notification. The nyc bc does not limit this require ment to accessibleroof areas.
Commercial deck guardrails such as those found at restaurants bars and at multifamily homes such as apartments or condos are required to be 42 inches high minimum. In canada the maximum height from the ground is 24 inches. Height limits shown above are measured in feet. The minimum height of the railing varies based on the height of the deck.
Likewise elevator penthouses are exempted to a maximum of 16.