The American Institute of Steel Construction and the Steel Joist Institute recently released a comprehensive roof design guide addressing rain loads and ponding.
Design Guide 40, Rain Loads and Ponding provides guidance for designing roof systems to avoid or resist water accumulation and any resulting instability. It includes an in-depth review of rain loads and ponding effects to help design professionals properly and efficiently design for ponding on roofs constructed with structural steel, open web steel joists, and joist girders.
It also contains several recommended methods of analysis that can be used to consider the effects of ponding, methods of design accounting for ponding effects, and a presentation of the SJI Roof Bay Analysis Tool, along with design examples that illustrate the concepts discussed.
Design Guide 40 is available for download at aisc.org/dg.
Related Stories
| Dec 18, 2013
ASHRAE publishes 2013 thermal comfort standard
Major revisions for design and measurement of comfortable spaces are included in a newly published ASHRAE 2013 thermal comfort standard.
| Dec 4, 2013
Five U.S. cities leading on climate change initiatives
Houston, Salt Lake City, Miami, New York, and Los Angeles are five cities that are leading the way on preparing for climate change and extreme weather, according to a Center for American Progress report.
| Dec 4, 2013
Meet the 'world's greenest building': One Angel Square
The 500,000 sf, 14-story One Angel Square in Manchester, England, is being promoted as "the most environmentally-friendly building in the world."
| Dec 3, 2013
Architects urge government to reform design-build contracting process
Current federal contracting laws are discouraging talented architects from competing for federal contracts, depriving government and, by inference, taxpayers of the best design expertise available, according to AIA testimony presented today on Capitol Hill.
| Nov 27, 2013
ASHRAE data center standard open for public review
Standard 90.4P, Energy Standard for Data Centers and Telecommunications Buildings, is being developed in response to requests to recognize the energy performance profiles unique to data centers.
| Nov 27, 2013
ASTM issues revised standard on phase I environmental site assessments
ASTM has issued revised standard ASTM E1527-13 that governs phase I environmental site assessments.
| Nov 22, 2013
Kieran Timberlake, PE International develop BIM tool for green building life cycle assessment
Kieran Timberlake and PE International have developed Tally, an analysis tool to help BIM users keep better score of their projects’ complete environmental footprints.
| Nov 20, 2013
How LEED and Green Globes stack up
An analysis of the strengths and weaknesses of the Green Globes rating system and LEED standards puts LEED ahead, but doesn’t discount the merits of Green Globes.
| Nov 14, 2013
First LEED v4 certified project garnered by Beijing furniture showroom
Haworth’s showroom in Beijing’s Parkview Green building has been recognized as the world’s first certified LEED project under the USGBC’s new LEED version 4 beta program.
| Nov 14, 2013
GSA asks for input to help study energy-efficient technologies on its buildings
The General Services Administration has posted a request online, asking those in industry, academia and nonprofits for information on green building technologies.
