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
Multifamily Housing | Mar 16, 2015
New Jersey Supreme Court puts control of affordable housing agency in the courts
The court said the state’s affordable housing agency had failed to do its job, and effectively transferred the agency's regulatory authority to lower courts.
Codes and Standards | Mar 16, 2015
San Jose adopts bird-friendly building standard
The standard includes avoiding large chunks of transparent or reflective glass and adding fritting.
Codes and Standards | Mar 12, 2015
Energy Trust of Oregon offers financial incentives for net-zero buildings
The organization is offering technical assistance along with financial benefits.
Codes and Standards | Mar 10, 2015
Real estate interests push Congress for Census funding
The groups have joined forces to urge Congress to fully fund the 2020 Census and the annual American Community Survey in its 2016 budget.
Codes and Standards | Mar 5, 2015
Charlotte, N.C., considers rule for gender-neutral public bathrooms
A few other cities, including Philadelphia, Austin, Texas, and Washington D.C., already have gender-neutral bathroom regulations.
Codes and Standards | Mar 5, 2015
FEMA cuts off funding to Indiana after Kokomo continues building stadium in flood zone
FEMA will withhold funding on $5.5 million worth of projects such as building tornado safe rooms in schools.
Codes and Standards | Mar 5, 2015
Construction problems at prison spur support to quash non-traditional project delivery in Iowa
Iowa lawmakers are investigating construction problems at the Fort Madison prison project and are scrutinizing rules regarding project delivery on state projects.
Codes and Standards | Mar 5, 2015
AEC industry groups look to harmonize green building standards, codes
The USGBC, ASHRAE, ICC, IES, and AIA are collaborating on a single green code.
Codes and Standards | Mar 2, 2015
Nevada moves to suspend prevailing wage rules on school projects
The Nevada Senate approved a bill that would suspend prevailing wage rules on school projects.
Codes and Standards | Feb 22, 2015
Louisiana officials critical of stricter building standards in flood-prone areas
Buildings would have to be built either two or three feet above the base flood elevation for a 100-year flood or above the base elevation for a 500-year flood.
