Should I pour concrete before or after my steel building installation?
When you’re preparing your site for installation, you may be wondering whether you should pour the concrete slab before or after the installation. While there are pros for pouring your concrete slab prior to installation, there are also pros for pouring your slab after installation. Each option also has its fair share of cons that you should take into consideration when making this decision. A few of the factors to consider include the concrete footings, the foundation for the anchors, and the foundation that will support the weight of the steel building. Another factor to keep in mind is the local requirements for your area, so we recommend checking in with your township/city to see what requirements you must follow.
One factor to consider when choosing the foundation for your building is what you would like the building to be anchored to. If you choose to pour your concrete slab first, then the installation team will anchor the building with concrete wedge anchors into the concrete footings of the slab. For info on our concrete wedge anchors, click here. However, if you decide to pour your slab after installation, then the building will be anchored into the ground with mobile home anchors. After the building is installed the slab will be poured on the inside of the building and cover only part of the mobile home anchors. The top part of the mobile home anchors will still be visible above the concrete slab. For info on our mobile home anchors, click here.
Pouring concrete after installation
o Save on cost of footings
One important benefit that you’ll receive when pouring a slab on the inside of your building is that you save the cost of the concrete footings, which can get quite costly. However, we recommend checking with your township since some townships may require you to get a footing with your slab. If you choose not to get footings, you may incur fines for not following the local code in your area.
o Anchors are reinforced by concrete
If your township allows you to pour the concrete slab on the inside of your building then the concrete will be poured up to the base rail and will cover a majority of the mobile home (auger) anchors. Your anchors and base rail are then reinforced by the concrete slab for additional strength. Take a tour of a building with a slab poured on the inside by clicking here!
o Ground shifting
Due to the inclement weather we experience in the Midwest, the ground goes through many changes such as freezing and thawing during the change of seasons. If the ground shifts and there is no footing, the slab may sink or move- causing a shift in the building.
Pouring concrete before installation
o Foundation strength
A benefit to pouring the foundation first and having the building anchored to the footings is that the weight of the metal building rests on the concrete footings rather than a ground foundation.
o Anchors are reinforced by footings
Another way the anchors are reinforced with concrete is by anchoring them directly into the footings of the concrete slab. With this option concrete anchors are used rather than the mobile home (auger) anchors.
o Cost of footings
A con of pouring the slab with footings prior to your building’s installation is that you incur the cost of the concrete footings. Although these may get costly, they may be required depending on your local township.
o Lead times/cure times for concrete affect installation lead times
A very important factor to keep in mind when pouring your slab before the installation is the current lead times for the concrete slab. For example, if the lead times for the slab are 3-4 weeks, you would have to wait 3-4 weeks for the slab, an additional week (approximately) for the cure time, and the lead times for the building.
Midwest Steel Carports, Inc.
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