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CONSTRUCTING A BASE...
No matter which of the options below you choose for a base, an ARROW ANCHORING KIT is
recommended as an effective method of properly securing your building after assembly is complete.
OPTION 1: Directly on ground (earth)
Assemble your building directly on level ground (grass, dirt, rock, sand, etc.). If you choose this option Arrow has a simple kit available
to provide a fl oor inside the shed to keep stored items off the ground. This kit can be used to support a plywood fl oor (wood not
included) or be fi lled with sand/rock to provide a solid surface. (Order No. FB109-A or 68385-A)
OPTION 2: Wood Platform
If you decide to build your own base, be sure to select the appropriate materials.
These are the recommended materials for your base:
• 2 x 4's (38 mm x 89 mm) Pressure Treated Lumber • 5/8" (15,5 mm) 4 x 8 (1220 mm x 2440 mm) Plywood-exterior grade
• 10 & 4 penny Galvanized Nails • Concrete Blocks (optional)
NOTE: Pressure Treated Lumber must not be used where it will make contact with your storage building. The properties of
Pressure Treated Lumber will cause accelerated corrosion. If Pressure Treated Lumber comes in contact with your storage
building your warranty will be voided.
The platform should be level and fl at (free of bumps, ridges etc.)
to provide good support for the building. The necessary materials
may be obtained from your local lumber yard.
To construct the base follow instructions and diagram.
Construct frame (using 10 penny galvanized nails)
Measure 16"/24" (40,6 cm/61,0 cm) sections to construct
inside frame (see diagram)
Secure plywood to frame (using 4 penny galvanized nails)
OPTION 3: Concrete Slab
The slab should be at least 4" (10,2 cm) thick. It must be level
and fl at to provide good support for the frame.
The following are the recommended materials for your base.
• 1 x 4's (19 mm x 89 mm) (will be removed once the concrete cures)
• Concrete • Sheet of 6 mil plastic
• We recommend for a proper strength concrete to use a mix of:
1 part cement • 3 parts pea sized gravel • 2 1/2 parts clean sand
Prepare the Site/Construct a Base
1. Dig a square, 6" (15,2 cm) deep into the ground (remove grass).
2. Fill up to 4" (10,2 cm) in the square with gravel and tamp fi rm.
3. Cover gravel with a sheet of 6 mil plastic.
4. Construct a wood frame using four planks of 1x4 (19 mm x 89 mm)
lumber.
5. Pour in concrete to fi ll in the hole and the frame giving a
total of 4" (10,2 cm) thick concrete. Be sure surface is level.
FRONT
(DOOR)
Note: Platform/Slab will extend 9/16" (1,4 cm) beyond
fl oor frame on all four sides. Seal this 9/16" (1,4 cm)
of wood with a roofi ng cement (not included), or bevel
this 9/16" (1,4 cm) of concrete when pouring, for good
water drainage.
FRONT
(DOOR)
Note: Finished Slab dimensions, with lumber removed.
15
15GC
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