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
K-12 Schools | Nov 6, 2014
New Sandy Hook school features could influence security standards
The design of the new Sandy Hook Elementary School on the site of the 2012 Newtown, Conn., school shooting features enhanced security measures—some subtle and others more prominent.
| Oct 30, 2014
Steel Framing Industry Association’s certification program aims to ensure connector quality
The Steel Framing Industry Association has launched a certification program to ensure that cold-formed steel connectors meet quality guidelines, building codes, and ASTM standards.
| Oct 30, 2014
USGBC pushes back LEED v4 deadline
Extending the deadline gives LEED users additional time to prepare for LEED v4, the latest version of LEED, which features increased rigor and multiple updates.
| Oct 24, 2014
International WELL Building Institute launches green building standard
The International WELL Building Institute has launched the WELL Building Standard Version 1.0, which focuses on enhancing people’s health and well-being through the built environment.
| Oct 16, 2014
U.S. military concerned about climate change putting bases at risk from floods
Among the challenges the armed forces may face is rising sea levels that could put Navy docks and other installations under water in places like Norfolk, Va., Honolulu, and other coastal locations.
| Oct 16, 2014
Fannie Mae releases white paper on energy performance of multifamily buildings
The least energy efficient multifamily property may be spending $165,000 more in annual energy costs than a similar property operating the most efficiently, according to a new white paper released by Fannie Mae.
| Oct 16, 2014
Energy Department sets green building standards for federal agencies
LEED Silver may be used, and in some instances, the Green Globes program may be substituted, according to a new regulation by the U.S. Department of Energy.
| Oct 16, 2014
New York City’s climate plan includes tripling of solar energy
New York City’s plan to cut greenhouse gas emissions by 80% by 2050 includes tripling the amount of solar power generated from city-owned buildings.
| Oct 15, 2014
Drones may soon assist code inspectors for construction in the UAE
The United Arab Emirates’ Ministry of Labour announced that they will start using drones to help inspectors record when construction sites are breaking laws.
| Oct 2, 2014
Fannie Mae study says affordable rental units more energy efficient than market-rate units
Fannie Mae’s new report on energy usage in the multifamily sector found that affordable properties use 28% less energy per unit and are 29% smaller than market-rate properties.
