Roof Load City Of Portland

Oregon requires a minimum roof snow load of 20 psf pm in asce7 for all roofs plus a 5 psf rain on snow surcharge for many roof types resulting in a 25 psf minimum roof design load for most roofs.

Roof load city of portland.

Minimum roof snow load. Please refer to city of portland title 24 85 for additional information. Translation interpretation modifications accommodations alternative formats auxiliary aids and services. This may not be reduced for slope or any other conversion factor and may be only modified where applicable by a rain on snow surcharge.

A seismic upgrade may be required for existing buildings undergoing a change of use or occupancy addition renovation alteration or urm building re roof. The city of portland ensures meaningful access to city programs services and activities to comply with civil rights title vi and ada title ii laws and reasonably provides. To request these services contact 503 823 4000 or tty 503 823. The city of portland ensures meaningful access to city programs services and activities to comply with civil rights title vi and ada title ii laws and reasonably provides.

Translation interpretation modifications accommodations alternative formats auxiliary aids and services. Ground snow load used for determining drift requirements is based on snow load analysis for oregon as published by the structural engineer association of oregon. 1505 5 edge securement for low slope roofs. See the oregon snow load map usage notes for further information and limitations.

City of portland title 24 85 governs mandatory seismic upgrades for existing buildings. See the map usage notes or snow load analysis for oregon part ii for further information. Roof systems with built up modified bitumen fully adhered or mechanically attached single ply through fastened metal panel roof systems and other types of membrane roof coverings shall also be. Roof slope 2 12 single ply roof system coverings installed in accordance with sections 1507 12 and 1507 13 shall be designed in accordance with section 1505 8 and ansi spri rp 4.

Designed to resist the design wind load pressures for compo nents and cladding in accordance with section 1609. The minimum design roof snow load is 20 psf 5 psf rain on snow surcharge where applicable per the oregon structural specialty code. 1504 3 1 other roof systems. To request these services contact 503 823 4000 or tty 503 823.