Outdoor sheds are great for storing garden equipment, tools and other items that are better stored near the outdoor areas they're used in, rather than taking up space tucked away in the home. A metal shed must be anchored securely, especially in regions prone to strong winds. For effective anchoring, you will need a foundation of either concrete or wood, and it must be level. Use anchoring kits and/or pier blocks to anchor metal sheds.
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Things you need
- Pier blocks
- Drill, wood and masonry drill bit
- Anchor bolts
- Anchor kit with heavy-duty augers, cable and clamps
Dig a hole for each of the pier blocks directly below the corner of the shed that will rest on top of it. Pier blocks are pyramid-shaped concrete blocks with a levelled top instead of a pointed pyramid top. The upper portion is made of durable, pressure-treated, rot- and infestation-resistant wood. The wood is manufactured to hold fast to the concrete below it. Sufficiently sized pier blocks should have a 30 cm (1 foot) square upper surface area and be at least 60 cm (2 feet) deep; so your holes must be at least 60 cm (2 feet) deep.
Check that the pier blocks sit exactly level in the holes and that the shed will rest evenly across the pier blocks and the surrounding earth. Align the blocks so that the entire surface area of each of the square-shaped wooden tops of the pier blocks will sit just inside the corner of the shed.
Place a prebuilt metal shed or construct the shed above the sunken pier blocks. Predrill holes for anchor bolts through the floor and down into the pier blocks. Screw the anchor bolts into the predrilled holes securely. Use at least four anchor bolts per pier block.
Install the anchors into the concrete foundation in a corkscrew manner. Drill holes at the four corners into the concrete using a masonry bit to a depth of at least 6.2 cm (2.5 inches) and insert the anchors until only 5 to 7.5 cm (2 to 3 inches) remain above the concrete foundation. The sides of the anchor screws will grasp the concrete, providing proper anchorage. Attach the augers to the anchor screws following the instructions provided in your anchor kit (auger attachments vary).
Insert the cables under the roof. One end of the cable will attach at one corner auger, run through the joist where the roof meets the wall at the corner, run under the roof but over the roof beams, then come out the other corner joist to attach to the opposite corner auger. When the cable is in place, attach each end to an auger. Tighten the augers to anchor the cable securely.
Repeat this process for the remaining two corners. Use both pier blocks and anchor kits together to anchor your metal shed securely against high winds.
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