Code Prescribed Wind Loads 1930's
Code Prescribed Wind Loads 1930's
(OP)
I am working on the renovation of a building constructed in the 1930's. It consists of steel framing and unreinforced brick masonry walls. Does anyone know the wind load requirements in the AISC Manual of Steel Construction or any other code that may have been applicable at that time? Thank you...






RE: Code Prescribed Wind Loads 1930's
RE: Code Prescribed Wind Loads 1930's
Steel Mill Buildings
Wind Pressure:
p = 0.004V2
where:
p: wind pressure on a flat surface normal to the wind direction, in pounds per square foot
V: wind velocity, in miles per hour
For rectangular buildings, Ketchum suggests using 80% of the above value and concludes that 30psf '...would be sufficient...' for all except exposed locations and that 20psf '...is certainly ample...' if the building is somewhat protected and the height is less than 30ft.
Steel Office Buildings
The following values are extract from a Carnegie Steel Company table, based on the building laws of various cities:
RE: Code Prescribed Wind Loads 1930's
The city that I work in wants to demolish a portion (~20%) of an existing building to make way for a developer to build a hotel. Demolishing this portion of the building would remove some masonry shear walls. We spoke with the city code official, and the official stated that as long as the remaining portion of the building can be shown to resist the lateral loads that were prescribed at the time of construction it is acceptable.
In response to dbuzz:
Thank you for the good information.
RE: Code Prescribed Wind Loads 1930's
From another source, a 1934 summary of wind loading equivalent static pressure is in general agreement with the data that dbuzz has offered.
www.SlideRuleEra.net
RE: Code Prescribed Wind Loads 1930's
RE: Code Prescribed Wind Loads 1930's
The city or governing agency under which the building exists is legally covered by a contemporary building code that requires certain prescriptions as to wind capacity and shearwall design. That is the legal document that the building code official is hired to enforce, not a 1930's era code.
RE: Code Prescribed Wind Loads 1930's
I recall reading a journal paper some years ago about the evaluation of old buildings to current standards, but unfortunately cannot recall which journal.