Concrete Slab Basics for Metal Buildings
Even prefabricated steel building kits need to start with a strong foundation like a concrete slab, but RHINO understands that not everyone knows where to start when it’s time to pour. What makes up a concrete slab foundation? Who decides the size? What can you do to prep your site for a concrete pour? In this article, RHINO Steel Building Systems walks you through concrete basics and preparation.
What Metal Buildings Need a Concrete Slab?
Not every metal building requires a concrete foundation. Many get by with poured piers and gravel. It primarily comes down to the building’s use and the owner’s preference. Once you have your building’s engineer-stamped structural plans, a civil engineer can work with you to establish exactly what foundation your build requires, including size, thickness, and design. RHINO Steel Building Systems also always recommends working with concrete professionals when it comes to the pour.
How to Prepare Your Site for Your Concrete Slab
Before any concrete can be poured — or even mixed — the erection site must be approved, cleared, and prepared. You will need to check your local building codes and get your building permit, engineered plan, foundation plan, and any other required documentation. Only once all the paperwork is taken care of and the building kit is ordered should steps be taken to prepare the erection site. First steps like clearing the work site of large rocks, trash, and anything organic like plants and roots can be done on your own.
Once the site is clear of debris, it is time to consult your concrete professional or general contractor for the rest of the prep work. They will use their expertise to dig out enough space for the slab to sit level without water pooling, while ensuring the ground beneath is sturdy enough — whether that means tamped dirt, gravel, or additional layers.
Pouring A Concrete Slab
Your concrete professional will pour all in one continuous flow to minimize weak points, and will utilize rebar or mesh inside to add additional strength. They can customize the surface to your preference, making it smooth or giving it more texture. Finally, the concrete will need to be left untouched for at least 5-7 days — more if it’s cold — with light moisture, before construction can begin on your steel building.
How Big or Thick Should A Concrete Slab Be?
There is no one-size-fits-all answer for size and depth for a concrete foundation slab. The depth of the concrete foundation will be determined by a Civil Engineer based on the structural plans RHINO provides. This ensures your foundation is sturdy enough to hold and support your specific building. The size and design of your slab will also be determined by your Civil Engineer, but should match to the dimensions of your metal building unless a sheet notch is accounted and designed for.
Concrete Slab for Your Metal Building
Now that you have an idea of what’s to come, get started on designing your prefabricated building kit. Our experienced metal building specialists will gladly answer all your questions.
