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
Codes and Standards | Apr 16, 2015
New York tops U.S. cities in walkability
Revitalization pushes Detroit and New Orleans up the rankings
Green | Apr 14, 2015
USGBC will recognize energy and water standards for the Living Building Challenge
This move means that projects achieving the energy and water requirements in Living Building Challenge will be considered as technically equivalent to LEED.
Codes and Standards | Apr 14, 2015
New York City preparing new codes for evacuation elevators
New York City’s Fire, Buildings, and City Planning Departments in New York are writing rules to govern occupant-evacuation elevators, reflecting a change in philosophy of how to evacuate people from skyscrapers in an emergency.
Codes and Standards | Apr 12, 2015
California imposes stringent new water standards
California is the first state to adopt standards that are more efficient than those set by EPA's WaterSense program.
Codes and Standards | Apr 12, 2015
Virginia surpasses Florida for strictest hurricane building codes
Virginia has edged out Florida as the state with the most stringent hurricane building codes, according to the Institute for Business and Home Safety’s “2015 Rating the States” report.
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.
