36 minimum height when surface is 30 above grade.
Roof deck design height limit lowered railing.
Deck guardrail height.
Decks attached to single family detached homes are regulated under the rules of the international residential code irc.
4 maximum gap between deck and underside of bottom rail.
In canada the maximum height from the ground is 24 inches.
4 maximum gap between balusters.
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.
Decks 24 to 5 10 180 cm need 36 guards and anything above 5 10 requires a 42 high railing.
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.
The irc requires guardrails to be at least 36 in height measured from the deck surface to the top of the rail.
34 minimum stair rail height from nosing to top of rail.
200 lb concentrated load.
If your porch floor is over the heights stated the code requires a balustrade porch railing.
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.
Respect minimum height requirements safety is important and something that should always supersede style.
Residential design advisory team rdat and do not require a pre application meeting or section 311 neighborhood notification.
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.
The planning code exempts stair penthouses to a maximum 10 feet above the prescribed height limit provided they do not exceed 20 percent of the roof area.
Additional documents may be available in some regions.
On the surface this seems to line up with ibc and osha regulations but there is one crucial difference.
The nyc bc does not limit this require ment to accessibleroof areas.
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.
50 lb concentrated load over 1 sqft or balusters.
2018 irc significant changes to deck provisions 25 deck design alternative provisions r301 1 1 other standards can be used to design a deck.
Height limits shown above are measured in feet.
A requirements for single family dwelling projects may be more restrictive as required by section 12 21a 17 of this code.
50 lbf vertical and horizontal load along top rail.
Likewise elevator penthouses are exempted to a maximum of 16.
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.
