WallsandCeilingsArchitect May 2011 : Page 5
Schematic visuals can provide a quick way to double check size, span and bearings at a glance. In some cases, all load information can be entered in the same screen. • Evaluated loads: In addition to gravity loads, some programs account for seismic and wind loads based on the project’s location. Ideally, the software will allow the user to easily toggle between region-specific settings and save regional parameters as a default. • Floor performance tools: Some software includes tools to evalu-ate framing performance—notably floors. For example, iLevel Forte’s single-member sizing software incorporates the company’s TJ-Pro rating system. The ratings allow designers to take into account peo-ple’s perceptions of how solid a finished floor will feel. Such infor-mation helps balance performance and cost when specifying members. • Price: Framing product manufac-turers offer some design programs for free download. These typically focus on their branded products and can be a convenient tool for designers using those materials. LATERAL BRACING According to the U.S. Geological Survey, in the past 10 years, an aver-age of seven earthquakes of magni-tude 6.0 or greater struck the Unit-ed States per year. All states have experienced damaging earthquakes during the nation’s history except Florida, Iowa, North Dakota and Wisconsin. As awareness of the haz-ards has grown, more jurisdictions are enforcing lateral bracing code requirements. Design software can reduce the time and complexity of calculating lateral loads and design-ing shear walls. It provides a ready way to demonstrate compliance with both seismic and wind loads for project approval. Features to look for in lateral bracing software include: • Structure types accommodated: Programs developed specifically for wood-framed buildings help optimize materials and provide accurate engineered values. As one example, some tools include June 2011 | www.wconline.com | 5
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