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198935 R17
3.1.3 Roof Snow Load vs. Ground Snow Load
The Roof Design Capacity tables reflect roof snow load (RSL) values. These are design values. Often,
comparisons are made to ground snow values (GSL). These are not the same. The conversion from GSL to RSL
varies between jurisdictions and is governed by building codes:
• In the United States, for grain bins, GSL = RSL x 2
• In Europe, for grain bins, GSL = RSL x 1.25
• In Canada, for grain bins, the GSL/RSL conversion varies with every location across the country. However, for
comparison purposes, the US conversion can be used as an approximation.
Therefore, when comparing against competitive GSL values in the US, double the above values. When
comparing against competitive GSL values in Canada, double the above values for a reasonably close
approximation.
3.2. Foundation Design and Loads
The foundations for the stiffened bin models are based on 4000 lbs. per sq. ft. (192 kPa) soil bearing capacity.
All foundation designs use 3000 lbs. per sq. in. (21 MPa) ultimate compressive strength (after 28 days) for
concrete and 43,500 lbs. per sq. in. (300 MPa) re-bar. The foundation designs included in this manual are
suggestions only, and will vary according to local soil conditions. Westeel will not assume any liability for results
arising from their use.
Important
Foundation should be uniform and level. Level should not vary by more than ¼" over a span of four feet
under the bottom ring angle. Any variance from level must be shimmed under upright base assembly. If
being utilized to support a full floor aeration system, this levelness requirement should extend across
the complete floor area.
3.3. Site and Assembly
Unless otherwise specifically provided in writing, Westeel does not take responsibility for any defects or
damages to any property, or injury to any persons, arising from or related to any site or assembly
considerations, including but not limited to:
• Bin location and bin siting
• Soil conditions and corresponding foundation requirements
(Note that the examples provided in manuals are for specifically stated soil conditions.)
• Bin assembly (Westeel recommends the use of qualified bin installers).
Contact Westeel for information on installers in your area.
• Field modifications or equipment additions that affect the bin structure
• Interconnections with neighboring structures
• Compliance with all applicable safety standards, including but not limited to fall restraint systems (ladders or
other systems). Local safety authorities should be contacted as standards vary between jurisdictions.
HOPPER LADDER MAKE-UP PACKAGES – WIDE-CORR® GRAIN BIN
