CITY, STATE and NEAREST LARGE CITY are important because location may control code to be used for design.
Platforms sheltered or inside other structures (INDOORS) will not require wind or snow loads. This answer may be apparent from specifications or drawings, but not so apparent from a telephone request for quote.
Platforms outdoors and ABOVE GROUND (like on buildings) will have larger gust factors for wind conditions.
Platforms in OPEN AND FLAT TERRAIN support HIGHER wind loads and LOWER snow loads. Platforms can be designed for worst case, but may be conservative and unnecessarily uneconomical.
Building codes may vary by locality. The IBC (International Building Code) is becoming the standard, however, other applicable building codes may be BOCA, SBC, ANSI (now ASCE-7) or a local (city or state) building code. All design information can be easily obtained except local building code information.
WIND LOAD is usually given in MPH (miles per hour).
SEISMIC DESIGN CATEGORY is to be designated. If unknown, design will default to ASCE-7.
SNOW LOAD is given in PSF (pounds per square foot). Local conditions may govern in mountain regions, the west coast through the Rocky Mountain states and the East coast, North of Massachusetts.
LIVE LOAD is usually given in PSF (pounds per square foot). Typical design values for platforms are:
DEFLECTION CRITERIA is typically:
CONCENTRATED LOADS are ADDITIONAL TO LIVE LOAD and may be permanent equipment, barrels or drums of chemicals, pallets of materials, boxes, etc. Obtain these LOADS in LBS. and possibly an area over which they act (i.e. pallets 4'x4' weighing 4,000 lbs. ea.)
CORROSIVES AND TEMPERATURE may dictate EXTREN® requirements. EXTREN® SERIES may be specified. STANDARD COLOR or OTHER color is needed. HARDWARE will be bolts for structurals, grating clips and bolts, etc. SPECIFY as necessary.
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