Ground Anchor 3 x 63 x 0.14in (for 2" SGA) Installation

Should churning or augering occur without immediate correction, the screw should be
removed and repositioned. If using the same hole is required, 3/8” “chip” gravel can be
poured into the hole to re-establish the load-ability following the installation procedures
described above. A maximum of 15 RPMs is advised and only with a mechanical driver capable
of enough crowd to advance the screw as described above.
• Rotation must be used during installation. Simply pressing or pounding the screw into
position does not allow the threading to engage the soil. This will lessen the tension
(uplift) loading.
• If a void is encountered during installation, the screw should be removed and
repositioned or removed and 3/8 chip gravel poured into the hole. This re-establishes
the product’s load capacity.
• Frost maps are used to determine screw length selection. Frost depths 0 to 42” use a
minimum 1600mm or 5’3” screw. Frost depths 43 to 49” use a minimum 1800mm or
5’11” screw. Frost depths 50 to 56” use a 2000mm or 6’7” screw. Frost deeper than
56” are not covered by this Document and require Engineering Certification. These
measurements are calculated to ensure 2/3 of the total thread length are installed
below frost level to act against heave. **Though it may occur, we do not claim any
additional increase in loads as the screw length increases.
Obstructions and refusal
• An obstruction causing refusal is when something in the subsurface does not allow the
screw to continue its downward motion. At this point the soil will begin to churn and
rise to the surface. At this point you can relocate the screw or predrill the hole as
described below.
• Ground screws can be installed through cobbled rock and fractured shale without pre-
drilling. However, large stone and bedrock require predrilling at a diameter slightly
larger than the maximum diameter of the threads. If pre-drilling is required, drill
cuttings or small gravel can be placed into the hole and the screw can then be
reinstalled to depth. This action can be equated to installing a concrete screw (Tapcon).
*Always check with your local Code officials prior to purchase.