Rainfall Intensity: 3.25 in/hr Ground Snow Loading: 25 psf Wind Zone: 90 mph Ground Roughness Coefficient: B The George Washington University Ashburn, VA Campus Rainfall Intensity: 3.25 in/hr Ground Snow Loading: 25 psf Wind Zone: 90 mph
Ground Roughness Coefficient: C Construction Project Submittals Construction project submittals, for new construction or additions, should consist of the following: 1. Site Plans - Include finished floor elevations, finished grading elevations and details on additions and modifications to the yard mains, control valves and fire hydrants. 2. Construction Drawings- Include basic construction details, finished roof elevations of both new and any adjacent, existing buildings, insulation and finishing materials details, roof loading design criteria, etc. For "pre-engineered” metal buildings, complete construction drawings and roof load calculations are required. 3. Specific Exposures - For areas requiring specialized construction, technically complete drawings and calculations should be submitted. For example, damage- limiting construction for occupancies with explosion potentials (flammable liquids handling, ammonia compressor rooms, etc.) or roof areas with unbalanced snow load potentials (snowdrifts). ROOFING/RECOVER PROJECTS General Roof Deck and Above Deck Assembly Guidelines 1. An FM Approved noncombustible or Class 1 fire rated roof assembly should be chosen. The windstorm rating and design uplift pressures should be based on the criteria provided in construction guidelines and incorporate a building importance factor of 1.15. 2. If within the scope of the project, an FM Approved roof deck and Approved side lap fasteners should be used. 3. All buildings should be designed using a minimum balanced ground snow load as listed in construction guidelines. Despite the allowances made by local codes, this ground snow load should not be reduced by more than 10%. Increased loading due to elevation changes must be considered in the design calculations.
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