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
| Sep 20, 2012
Reflective roofs could reduce rainfall in Arizona
Green standards may have to take into account the impact of reflective roofs on rainfall in the desert Southwest.
| Sep 20, 2012
Earth Advantage Institute offers green certification for small commercial buildings
Earth Advantage Institute announced a new green building certification aimed at new or substantially remodeled small commercial buildings built to green standards.
| Sep 14, 2012
NRCA University offers photovoltaic class
NRCA University will offer a class called “Photovoltaic Roof Systems: Energizing Your Business” Oct. 16 in Philadelphia.
| Aug 30, 2012
Public comment period is open for CRRC-1 standard
The CRRC-1 standard covers specimen preparation and test methods for measuring the initial and aged solar reflectance and thermal emittance of roofing products.
| Aug 30, 2012
Georgia drops LEED wood source standard on state projects
Currently, LEED green building standards only accept timber products certified by the Forest Stewardship Council (FSC).
| Aug 21, 2012
RoofPoint green rating system for roofs includes durability and life span factors
The "RoofPoint" rating system from the Center for Environmental Innovation in Roofing provides specific standards to help nonresidential roofing projects become sustainable, says Jim Hoff, research director for the Center and president of TEGNOS Research.
| Aug 21, 2012
Supportive government policies drive green building growth, says Lux Research
Green building's footprint tends to grow fastest in countries that have national policies that promote construction of sustainable, energy-efficient structures, according to a report by Lux Research.
| Aug 21, 2012
BIM is a vital tool for creating the most sustainable building designs
BIM is an essential tool to develop sustainable buildings, says U.K. architect Elrond Burrell.
| Aug 16, 2012
CSI webinar on August 21 focuses on electronic energy control
The Construction Specifications Institute (CSI) is sponsoring a free webinar on August 21 at 2:00 p.m. (EDT) on electronic energy control.
| Aug 16, 2012
Public sector pushes sustainable building forward
Not usually noted for its innovation, the public sector has done the most to advance sustainable building, according to a recent panel of green building professionals.