Written by Rocky Mountain Metal · Reviewed by Micah Hostetler, Owner · Based in Penrose, CO, serving Colorado.
Yes. A steel-framed building needs a level foundation, so slopes are solved with cut and fill, a retained pad or an engineered foundation. Elevation mainly changes the engineering, since the building is designed to your site's snow and wind loads.
Key takeaways
- A steel building sits on a level pad or foundation; the slope is solved before the building arrives.
- Cut and fill works for gentle grades; steeper sites need a retained pad or an engineered foundation.
- Snow load climbs with elevation, and the building is engineered to your site's number.
- Rock near the surface affects excavation and anchoring, so look before you plan.
- Truck and crew access matters more on a hillside than anywhere else.
How does a steel building handle a slope?
A steel frame bolts down to a level foundation, so the ground has to be made level first. Three common approaches, from least to most earthwork:
- Cut and fill to a level pad. Cut into the uphill side and use that material to fill the downhill side, compacted in lifts. Works well on gentle slopes. Fill that is not compacted properly settles, and a settling pad pulls a steel frame out of square.
- Retained pad. A retaining wall on the uphill side holds back the cut and gives you a full level pad. More site work, most usable floor.
- Engineered foundation on the grade. On some sites a foundation with taller walls or piers on the downhill side brings the building up to level without moving as much dirt. This is designed for the specific site.
Drainage governs all three. Water running down the hill has to be intercepted above the building with a swale or drain and carried around it. See how to prepare your site.
What changes as you go up in elevation?
Snow load
Ground snow loads rise with elevation, and they vary a lot from one parcel to the next. A building near Salida, Durango or Trinidad may be designed to a heavier load than the same size building on the plains. Every building is engineered to the snow and wind loads for its site, and the price varies with the snow load, so the location has to be known before the quote is final. See what snow load does my building need?
Frost depth
Foundations go deeper where frost goes deeper. Your county sets the requirement, and higher sites often require more than the valleys. Deeper footings mean more excavation and more concrete.
Rock
Many foothill and mountain parcels have rock close to the surface. That affects how the pad is cut, how footings are dug and how the building is anchored. It is one of the things we look at during the site visit.
Wind
Ridge tops and open mountain parks are exposed. The frame, bracing and anchoring are engineered for the wind at your site. See are metal buildings good in snow and wind?
Season
Frozen ground and snow slow excavation and concrete. The reliable window for site work is shorter up high, so plan the pad and foundation so they are ready when the building is delivered.
Where does the snow go when it slides off?
Snow sliding off a metal roof matters more at elevation. Keep doors and walkways off the eave drop line or add snow retention, make sure any lean-to roof is designed for the slide, and do not park or stack firewood under the eave. See do I need to shovel snow off a metal roof?
Can the delivery truck and crew get to the site?
Hillside driveways are the most common reason a delivery gets complicated. Grade, tight turns and soft spring ground all matter for the truck bringing the building and the manufacturer's crew that installs it. See how much room does a crew need?
How Rocky Mountain Metal plans a sloped or high site
We look at your site, including the slope, the access and the likely snow load, and plan the building and its placement with you. We place the order with 1st Choice Metal Buildings and Carports, the building is engineered to your site's loads, and the manufacturer's crew from Texas installs it while Rocky Mountain Metal oversees the project. Close to home in the Penrose and Fremont County area, that can include coordinating the site work start to finish; farther out, we supply and oversee the building and you line up the dirt work locally. Permit requirements vary by county, and we'll walk you through what yours requires. See our service area and start with a free quote.
Frequently asked questions
Is a slope more expensive to build on?
Usually somewhat, because of earthwork, retaining or a taller foundation, and access. How much depends on the grade and the ground, which is why the site visit comes first.
Can I have a level floor on a hillside?
Yes. A steel building needs a level foundation anyway, so cut and fill or a retained pad gives you a level floor by design.
Does elevation change which building I should pick?
It changes the engineering more than the style. The frame, roof and anchoring are designed to your site's snow and wind loads, and that design is reflected in the price.
When should I start planning a mountain build?
Early. Ordering, permitting and site work all take time, and you want the foundation ready before the season closes. We'll give you a timeline with your quote.
