roof decks!

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Posted by: guest at November 30, 2007 11:54 AM

The roofdeck rules are stringent if your building is classified as fireproof. In effect the roofdeck cannot be made of wood or other flammable materials.
However if you live in a non-fireproof building ie: a browntone, anything goes. I guess they figure the whole building is a tinderbox anyway so what will more wood on the roof matter?
Truly that's the way it is.
You also need to find out if your roof can support more than two or three people at a time. This is a real concern. Old roofs were not strongly framed. In fact, some roofs look like they were framed with popsicle sticks.

Posted by: guest at November 30, 2007 3:38 PM

Zoning F.A.R.? possibly?
If not, probably just needs to meet Fire and Egress like the rest of your building.

Posted by: guest at November 30, 2007 3:42 PM

I know you have to have railings as well, at least 48 inches tall, I believe. But I'd check with DOB on that.

Posted by: guest at November 30, 2007 3:55 PM

At least for brownstones, fire code prevents you from covering more than a small portion (10 or 20%, i think) of the roof with flammable material.

For a larger wood deck, you can run steel beams from party wall to party wall, and then put the wood decking on the steel. This takes the flammable material off of the roof (enabling a larger deck), and has the added benefit of taking the weight of the deck (and planters and people) off of the roofbeams.

I believe that fire code also prevents you from putting flammable material within 3 ft of the lot line, regardless of whether the flammable material is up on steel or not.

I've heard that ipe is not considered flammable, but it's expensive.

Posted by: guest at November 30, 2007 4:07 PM

For all buildings in the city a maximum of 20% of the total roof area can be a flammable (wood) material. If you choose to you a non-flammable material (stone or concrete pavers) you can cover the entire roof.

However, if you really want to use wood, you can use Ipe. Because of it's density, NYC has designated certain applications as non-flammable.

Posted by: guest at November 30, 2007 4:34 PM

railings need to be 42"

Posted by: guest at November 30, 2007 4:36 PM

Here is a link that answer your questions by a liscensed engineer:

http://randpc.com/AskTheEngineer/genAsktheEngineerRoofDeck.asp

Posted by: guest at November 30, 2007 5:43 PM

ask gert

Posted by: guest at November 30, 2007 9:01 PM

I think the DOB rules are based on Shariah law or something

Posted by: guest at November 30, 2007 9:03 PM

The idea that ipe is considered non-flammable by the DOB is a myth. When you speak with someone from the DOB, they say that it is considered flammable. Good luck with your deck.

Posted by: guest at December 5, 2007 6:57 AM