New York 2007 Code Snow Loads - reduced??
New York 2007 Code Snow Loads - reduced??
(OP)
I'm trying to figure out why the ground snow loads in the new New York State building code are lowered in a majority of the state. I am having a hard time designing to the lower loads, like I'm missing some calculation factors that bring the roof loads back to the old numbers anyway.
Does anyone have any insight here? Thanks...
Does anyone have any insight here? Thanks...






RE: New York 2007 Code Snow Loads - reduced??
I think that the change in ground snow load may be due to inaccuracy in the way the old snow loads were obtained. Prior to adopting the IBC, New York had its own unique building code that wasn't based on ANSI, ASCE, UBC, BOCA, etc. The old snow loads were originally presented not as ground snow loads, but as roof snow loads, and they were in use for many decades. When NY adopted the 2000 IBC in 2003, they had to take their old roof snow load values and convert them so they could be used with IBC and ASCE 7. They did this by dividing the roof snow loads by 0.7 to get to ground snow loads.
I believe the ground snow loads in the 2007 NY building code (based on the 2003 IBC) are based on more recent studies of snow loads in NY. I just use them and don't try to get back to the older values, which were generally higher than in the current code. I read this somewhere byt can't remember where.
RE: New York 2007 Code Snow Loads - reduced??
RE: New York 2007 Code Snow Loads - reduced??
RE: New York 2007 Code Snow Loads - reduced??
I only have the first IBC Building Code and Residential Code editions for NYS.
Also what will the new New York City IBC use for ground snow load. Is it out yet?
RE: New York 2007 Code Snow Loads - reduced??
Brace yourself PT999, loading on Long Island went from 45psf for Pg to 20psf.
See why I'm having a hard time with it?
RE: New York 2007 Code Snow Loads - reduced??
Does NYC follow the 2006 IBC building Code or the ASCE-7 Minimum Design Load for buildings?
THanks
Calif
The resisant virtues of the structure that we seek depend on their form; it is through their form that they are stable, not because of an awkward accumulation of material. There is nothing more noble and elegant from an intellectual viewpoint than this: to resist through form. Eladio Dieste
RE: New York 2007 Code Snow Loads - reduced??
The 1968 code (still in use until July) called for 30 psf roof snow load.
RE: New York 2007 Code Snow Loads - reduced??
Calif
The resisant virtues of the structure that we seek depend on their form; it is through their form that they are stable, not because of an awkward accumulation of material. There is nothing more noble and elegant from an intellectual viewpoint than this: to resist through form. Eladio Dieste
RE: New York 2007 Code Snow Loads - reduced??
Just recently, the City adopted a new IBC based Code, but with NYC specific sections, to be effective July 2008.
This new code does not appear to be on sale at the ICC yet as far as I can tell, but apparently is downloadable at the DOB website.
I looked at the Soils and Foundation section, and all of it seemed to be underlined, meaning specific to NYC and different from the regular IBC Code
RE: New York 2007 Code Snow Loads - reduced??
The calculations are the same as in ASCE 07, but we have a special loading map.
RE: New York 2007 Code Snow Loads - reduced??
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