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snow drift at penthouse
does anyone have any references for determining the height that roof top equipment or a penthouse has to be above the roof( up on posts with a space below) to prevent any additional load from snow drift.
our best guess here in the boston area is one foot, but i would like to confirm this.
check out our whitepaper library.
no such rule exists. the structure above the roof will block/slow the wind and cause the snow to fall at that location. a two meter horizontal separation for low rise buildings is used for no drift impact from adjoining buildings.
there is no code or technical reference that i am aware of. it is our obsevation that as long as you leave enough clearance under the equipment, the snow will blow under the equipment instead of creating a drift. we, generally, use the base snow load depth plus am little extra (6" to 12").

2009-09-15, 11:55 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	snow drift at penthouse snow drift at penthouse does anyone have any references for determining the height that roof top equipment or a penthouse has to be above the roof( up on posts with a space below) to prevent any additional load from snow drift. our best guess here in the boston area is one foot, but i would like to confirm this. check out our whitepaper library. no such rule exists. the structure above the roof will block/slow the wind and cause the snow to fall at that location. a two meter horizontal separation for low rise buildings is used for no drift impact from adjoining buildings. there is no code or technical reference that i am aware of. it is our obsevation that as long as you leave enough clearance under the equipment, the snow will blow under the equipment instead of creating a drift. we, generally, use the base snow load depth plus am little extra (6" to 12"). __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]