Accessory instructions, Chapter 11 accessory instructions, Sidedraw systems – Grain Systems Tanks PNEG-972 User Manual
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PNEG-972 Construction Manual for 2.66" Corrugation 105' Diameter Tall Tanks (28 Rings and Taller)
11. Accessory Instructions
Sidedraw Systems
Installation and Management of Sidedraw Systems
Grain Systems designs and manufacturers bins to the highest standards, however proper installation and
good usage practices for a commercial flume system are essential, regardless of manufacturer. The
following practices address general usage and installation criteria for such systems.
Sidedraw Installation
1. Side discharge is only permitted in GSI commercial bins when a GSI manufactured sidedraw flume
system has been installed. No corrugated steel bin should be unloaded through the sidewall without
installation of such a system and permission of the manufacturer.
2. Installation of a flume system may require installation of additional wind rings and 1" diameter
anchor bolts. Refer to
or the commercial bin section of the GSI sales catalog. Installation
of multiple systems requires additional wind rings and must be placed a minimum of 90° apart.
Installation of multiple systems requires approval of GSI engineering.
3. A sidedraw should not be the only discharge system available. A standard center discharge and
conveyor should be installed.
Sidedraw Management and Usage
1. Sidedraw systems are intended for use with dry flowable grain. Sidedraws are not to be used for
poorly flowing products. This is not unique to GSI bins and flume systems but is a general rule for
such systems.
2. In multiple system installations only one sidedraw may be used at any one time.
3. Filling should not be occurring at the same time as grain is being withdrawn through the sidedraw
flume system.
4. Prolonged storage of grain in the sloped condition produced by sidedraw discharge may accelerate
differential settlement and result in deformations of the bin/silo. After using the sidedraw system the
sloped grain should be returned to a near level condition by use of the center discharge. Leveling of
the grain should also allow more even consolidation of foundation and fill soils and produce more
even settlement of the bin/silo.
5. If geotechnical investigations or past experience indicate significant foundation level soil variations
or a site propensity toward differential settlement, sidedraw usage may be prohibited or severely
restricted. In this situation the use of a flume system should be reviewed with geotechnical
consultants or the foundation engineer.