When a home is built according to code in its region, a homeowner may never need to worry about frost lines. Most importantly, be there when the holes are done, and don't be afraid to measure the depth, any self respecting contractor won't mind. What happened to Rachel on Family Matters? Its also referred to as the frost depth. 5 How far down do you dig for deck posts? The Frost line in Iowa is 58 inches. Does footing need to be below frost line? This report provides the recommended design ground snow loads which are intended to be used with ASCE 7 procedures for structural design. As we mentioned before, make sure you check with your local building codes before you start digging. If you live in a warm climate, like South Florida, where frost rarely ever occurs, you may be allowed to place your footings on grade, but in very cold regions, like Minnesota and Canada, you will need to dig down 96 inches or more. Snow Loads are determined according to elevation. All Rights Reserved. and to a depth of 1/3-1/2 of the post height above ground. Under code, generally, one-story buildings with footings on undisturbed soil with LBVs between 1,500 and 4,000 should have a minimum width of 12 inches. Is a roofing permit required to re-roof a structure in the Summit County jurisdiction? Box 699Salida, CO 81201, *may be out of officefor inspections; call to confirm availability, 2015 International Residential Code2015 International Building Code2015 International Fire Code2015 International Plumbing Code2015 International Mechanical Code2015 International Fuel Gas Code2006 International Energy Conservation Code2015 International Existing Building Code2020 National Electric Code2017 OWTS RegulationsOWTS RegulationsAmendments adopted by Chaffee County BOH Resolution 2018-02OWTS Regulations Amendments adopted by Chaffee County BOH Resolution 2019-01 (Design Flows)2015 International Building Codes (Ordinance 2018-02), Ground Snow Load - See Snow Load MapWind Speed - 120 mph Vult.Seismic Design Category - CFrost Depth - See Minimum Footing & Foundation RequirementsWinter Design Temp 0 F, home | elected officials| departments | top, Central Mountain Small Business Development Center, Heart of the Rockies Regional Medical Center, 2006 International Energy Conservation Code, 2015 International Existing Building Code, Minimum Footing & Foundation Requirements. Source: ncdc.noaa.gov. The value of roof (or other member ) snow load shall be equal to the "recommended basic snow load" as defined in the 2016 Colorado Design Snow Loads." But when you're building a new home, addition or deck, knowing how deep frost can reach in an average winter is a crucial part of the process.. you have one map indicating the depth of frost, based in a survey of Bowles himself. This map displays current snow depth according to the National Oceanic and Atmospheric Administration (NOAA)National Snow Analyses (NSA). District, Risk Category l: 130mph (Ultimate) exposure B, Risk Category lll & lV:150mph (Ultimate) exposure B, Risk Category ll (most structures): 140mph (Ultimate) exposure B. Necessary cookies are absolutely essential for the website to function properly. The technical publication below contains the methodology used to create the 100-year return period of the AFI. 130 ultimate wind speed exposure C for elevations 7000 ft. and above U.S.G.S. Once again, dont take this information as gospel. An important aspect of this product is that it can be used by customers (decision-makers and the general public) who may or may not have any GIS expertise or highly sophisticated equipment. Always check with your local building inspector to see what is required in your area. That said, there are areas north of Denver a short drive away that can see frost depth at 30. This website uses cookies to improve your experience while you navigate through the website. Now that you have the correct footing depth, the following are six other . You also have the option to opt-out of these cookies. Frost Depth. Depth of Footings Footings should extend to a minimum depth of 12 inches below previously undisturbed soil. The population in 2010 was 106,433. But opting out of some of these cookies may affect your browsing experience. The provided map is an approximation, and the actual frost depth varies depending on your local climate, type of soil . Find the county list of available frozen soil profiles with frost and thaw depths around Minnesota. 1803.4Qualified representative. The design ground snow load shall comply with the Colorado Design Snow Loads Report and Map, published by the Structural Engineers Association of Colorado (dated May 6, 2015) or the table below. We apologize for any inconvenience. The data table publication contains a list of cities with the specific 100-year return period value located in the far right column. The frost line (also referred to as frost depth or freezing depth) is the average depth in which the ground water in soil usually freezes. Greater values could be required to meet energy conservation standards. MINIMUM FOOTING DEPTH AND INSULATION REQUIREMENTS FOR FROST-PROTECTED FOOTINGS IN HEATED BUILDINGS a For SI: 1 inch = 25.4 mm, C = [ (F) 32]/1.8. When below-freezing weather begins, the soil thats in contact with the air starts to freeze. Learn more at Decks.com. Please note: Due to scheduled maintenance, many NCEI systems will be unavailable Wednesday, March 1st, 3:30 PM ET - 7:30 PM ET. Most Current Edition Adopted by the State of Colorado ; ICC A117.1; 30 psf: Frost Depth: 30 inches: Loveland Building Code . Foundation walls four feet in height or less shall have two horizontal deformed bars both top and bottom as specified in the following paragraph. Your deck footing depth is controlled by two things. How do I contact a city/county department? Site-specific structural wind, snow, frost penetration, and earthquake loading data for DoD locations within or outside the United States, its territories and possessions is provided in this online tool. The Frost line in Connecticut is 36 inches. A concrete porch or patio is very difficult to remove. Timothy is the founder and editor of Charles & Hudson and former editor at Popular Mechanics, This Old House, and Lifehacker. You'll be redirected to Trex.com, our composite decking website. Search for "frost line". The cookie is used to store the user consent for the cookies in the category "Analytics". Other equations relate climate averages to ground temperatures in a pretty straightforward way. Appointments are available on Tuesday but are not required. The maximum height of a 4-inch (102 mm) load-bearing masonry foundation wall supporting wood-frame walls and floors shall be not more than 4 feet (1219 mm). The frost line depth may require deeper footings than indicated in Figure R403.1(1). Air-Freezing Index Statistics for the United States (DSI9712D). This extra volume is pushed up into the air, not down into the compacted soil. In the coldest climates in the USA, the frost depth can be deeper than eight feet. All construction within the City of Fort Collins shall comply with following codes adopted by City Council. Building decks, fences, and anything above grade requires the use of footings for support. prepared by the "Structural Engineers Association of Colorado, " ASCE 7 procedures shall be used to convert to roof snow loads. The Frost line in Delaware is 32 inches. Water pipes should always be set below a frost line to prevent them from freezing in the winter. Observation missing. Speed (miles per hour): 115 (ultimate design wind speed). Below that depth, the temperature varies, but is always above 32 F (0 C). This depth is determined by the frost line in your area and the map below will show you how deep you need to dig to safely place your footings. Other columns in the table contain lesser return periods and are listed for comparison purposes or other applications. You can do this by using our planting zone map tool. The maximum frost line depth is 100-inches as seen near the tip of Minnesota, North Dakota, and Alaska, all the way to zero inches in Florida, southern Arizona, and southern California. The Air-Freezing Index (AFI) is a common metric for determining the freezing severity of the winter season. Deeper is always better because there are rare weather events where extreme cold can happen over a winter and your deck or structure will survive where many others might have to have repairs when the ground thaws. A frost protected shallow foundation (FPSF) is a practical alternative to deeper, more-costly foundations in cold regions with seasonal ground freezing and the potential for frost heave. For a long fence line an auger at the end of a bobcat or PTO tractor is a great investment as it will dig the holes fast and accurately. Modify your browser's settings to allow Javascript to execute. Plantmaps has derived zones indicating the Interactive map of average annual First frost dates for the state of Colorado. Frost depth ranges from just 6 inches in the South and West to as much as 72 inches in the Northeast. Additionally, water and sewer pipes need buried below the frost depth. Oct.11 - Oct. 20. SNOW LOAD If you are building into the side of a steep hill or beside a retaining wall you will have to maintain the minimum distance to grade not only vertically but also laterally. The maximum frost line depth is 100-inches as seen near the tip of Minnesota, North Dakota, and Alaska, all the way to zero inches in Florida, southern Arizona, and southern California. The frost line is the depth at which the ground freezes. Terms of use. The frost line is simply the deepest point in the ground to which ground water will freeze. Its also important that the footings for a building or a deck be well below the frost line so the posts dont shift as the ground freezes and thaws. For those locations or if the planned construction site is not located nearby a station that has AFI data, using a combination of the AFI map and the most representative city(s) AFI value(s) is advisable. Once you know the Air-Freezing Index value for the area you will build, consult ICC Table R403.3(1), Minimum Footing Depth and Insulation Requirements for Frost . Of course, that's assuming you're setting the posts in . The Division of Housing's Building Codes & Standards (BCS) Section protects Colorado citizens by regulating diverse and unique aspects of the state's residential and nonresidential construction industry in partnership with local governments, the federal government, other state agencies, and the private sector. Click on your state to zoom in or enter your zip code to find the zone number of your specific area. Check your frost line by zip code or address using this map from the National Weather Service. We also use third-party cookies that help us analyze and understand how you use this website. Assigned inspectors are subject to change until 7 a.m. on the inspection day. 500 km. The prescriptive minimum footer depth is 24" below finished grade, on undisturbed soil. 2018 Reference Codes (for building permits applied for between: January 12, 2019 - April 14th, 2022), 2018 IRC - International Residential Code, 2018 IFGC - International Fuel and Gas Code, 2018 IPSC - International Swimming Pool and Spa Code, 2021 IRC - International Residential Code, 2021 IECC - International Energy Conservation Code, 2021 IFGC - International Fuel and Gas Code, 2021 IPSC - International Swimming Pool and Spa Code, 2021 IPMC International Property Maintenance Code, 40.585258, This is why its so important to be aware of the frost line and dig below it when installing your footings. Figure 1. Google Map, Copyright 2023 Douglas County Government | Accessibility Options| Privacy Policy, Website Design and Development by Webolutions, My Driver's License or Vehicle Registration, Register to Vote / Update Voter Registration, Ask a Question, Report Issues or Concerns, Building Your Home (Wildfire Mitigation Permitting Process). The grade of masonry units shall be determined from ASTM C 34, C 55, C 62, C 73, C 90, C 129, C 145, C 216 or C 652. b. How deep is the frost line in Colorado? Colorado according to Google Maps. About USGS/ Science Topics/ Maps, Products & Publications/ Education/Publication: FAQ. Click Belowfor a detailed State Frost Line Map: AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdaho, IllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippi, MissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregon, PennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming, When water changes from liquid to solid, it expands. Wind Loads: Building should be designed to with stain an ultimate 3-second gust of 115MPH in Routt County. Comparison of traditional, below-frost-depth foundation (48" deep) on right, frost-protected shallow foundation (14" deep) on left. Privacy Policy, 5 Reasons To Consider A Local Home Security Company, Water Damage Repair: What Can You Salvage, Go Organic to Shrink Your Gardening Budget, Check the Frost Line by Zip Code Before Digging Footings, Tow with Confidence: Why Every Truck Needs Airbags for Safer Hauling, Discover the Benefits of Blaklader Workwear for Every Industry, Upgrade Your Winter Wardrobe with Helly Hansen, How to Prevent Frost Heave When Setting Posts, GeneracGB1000 Portable Power Station Review. Do you have gravel, sand or clay soil? What size footings do I need for a 66 post? This page shows deep soil temperatures for those stations which are equipped with deep soil temperature probes. as amended, the State Housing Board of the State of Colorado (the Article 545 Housing Board") Built Nonresidential Structures; and THAT PURSUANT TO 24-32-3301et seq C.R.S. Copyright 2023 Trex Company, Inc. All rights reserved. 1 How deep is the frost line in Colorado? as amended, the State Housing Board adopts the For example, the frost line in Charlotte, North Carolina is 12 inches, while the frost line in Denver, Colorado is 36 inches. The public schools in Arvada are highly rated. Your deck will not pass inspection with inadequate footings and the posts can be forced up by frost when the ground freezes, known as heaving which can destroy it. Vail, for example, is 48. The USGS interactive map of the Colorado Front Range infrastructure resources is a Geographic Information System (GIS) database constructed to provide tools to spatially analyze natural resource data essential for making well-reasoned decisions about land use. Insulation requirements are for protection against frost damage in heated buildings. 2015 International Building Codes (Ordinance 2018-02) Local Amendments to the Codes Ground Snow Load - See Snow Load Map Wind Speed - 120 mph Vult. Learn how to use a concrete saw to cut a hole in a patio slab to install a deck footing. His work has been published on Wired, Bob Vila, DIY Network, and The Family Handyman. Only homeowners may request an a.m or p.m. inspection. Just as you dont want to build on poor soil where the weight of the building will cause unequal downward settling which can destroy the structure, you dont want the structure or your deck to lift up into the air unequally. Link to ArcGIS Online app for Frost Depth. The value of ground snow loads at building sites shall be determined through. Digging Your Footings On the safe side, dig your footings at least 48 inches deep, or check with your local code enforcement. There are online tools that allow you to enter a zip code to discover what the frost depth might be where youre building. How do I find the frost line on my property? The NSA are products of the The uplift force is tremendous and can do significant structural damage to your deck. So, in NC, 12 is technically the safe depth for the bottom of a footing. 8" Diameter. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. What is the frost line depth in Denver Colorado? Wind Load: 115 mph for 2018 IRC and 100 2018 IBC: Live Load: Per 2003 IRC and 2003 IBC: Frost Depth: 36 in . frost depth msbc rules 1303.1600 kittson roseau lake of the woods koochiching itasca marshall morrison meeker mahnomen wright benton mille lacs kanabec pennington red lake polk norman wilkin otter tail . Illinois State Water Survey - Water and Atmospheric Resources Monitoring Program (WARM)- IllinoisSoil Data. A total of 4984 stations (in blue) have calculated return period values for the 19812010 period, while the remaining stations (in red) indicate locations that were too warm to compute return period values. frost line depth in denver, CO. . The certificate shall list the type and efficiency of the heating, cooling and service water heating equipment installed. The Boulder County Community Planning & Permitting office at 2045 13th St., Boulder is open to the public on Monday, Wednesday, and Thursday from 8 a.m. to 3 p.m., and on Tuesday from 10 a.m. to 3 p.m. However, a depth of at least 18 inches should be maintained to provide Accordingly, those portions of the foundation that are set 6 feet or more inward from the skirting may be 12 inches shallower than the depths shown in Map 1. Exposure. The design roof snow load values shall be . The frost line in Colorado is typically 36 but can be deeper in areas with colder climates. Use only the 100-year return period in this publication for FPSF. Often, youll see contour lines on a frost-depth map where any point along that line represents the frost depth in those towns and cities where the line crosses. This process causes the ground and anything in it to move upwards. The ground will be thawed by then making it easier to dig to the proper depth. . If you are in a cold zone and arent in a rush to build, its best to wait until spring to start digging. Like so many communities in Northern Colorado, the TDS cable community of Arvada is growing. However, it is the -based in some specific data- opinion of a foundation expert, not the code. However, you may visit "Cookie Settings" to provide a controlled consent. 9 Where is the frost line in the United States? Map from Climatological Analysis of Historical Frost Depth/Frozen Ground Data in Wisconsin through 2015/2016 winter -- From Milwaukee Sullivan National Weather Service Office 2018 Maps of Midwest soil temperature-frost depth from North Central River Forecast Center (only available during this season) Severe Winter Weather Frost line depth: 36 inches Termite: none to slight Winter Design Temperature: -20F Ice Barrier Underlayment Required : Yes Flood Hazard: 989, Resolution 89-31, 2011 FIRM maps Air Freezing Index: 3447 ( BF -days-100 year) Good luck. Oil and Gas Map. USGS (U.S. Geological Survey) National Geologic Map Database. The frost line is simply the deepest point in the ground to which ground water will freeze.Its also referred to as the frost depth. Robert from Barrer Contracting Services in Barrie. For example, the frost line in Charlotte, North Carolina is 12 inches, while the frost line in Denver, Colorado is 36 inches. U.S. Department of the Interior | U.S. Geological Survey Supported by the National Cooperative Geologic Mapping Program Page Contact Information: Personnel Page Last Modified: Wed Mar 1 19:07:29 2023 Liquid water expands by nine percent when it freezes solid. Zone 8. Use only the 100-year return period in this publication for FPSF. The jurisdiction shall fill in the frost line depth column FCGov.com works best with JavaScript enabled. Frost Depth: 48" is frost depth throughout all off Routt County, avoid settling or heaving . The average frost line depth in southern Pennsylvania is 36 inches. Frost Depth. The Frost line in Florida is 0 inches. Footings also must extend at least 12 inches below the frost line (the depth to which the ground freezes in winter) or must be frost-protected. Our vast countries has many different frost levels. Information related to installing frost footings for decks, Learn about wood and composite decking materials, An in-depth look at the complex issue of how to build stairs, How to install guardrails and handrails to meet IRC code, An overview on water drainage, benches, planters and lights, Learn about permits and working with contractors, Build a covered deck to enjoy all seasons, Maintain your deck to maintain your investment. Check local building codes. R402.1.1 Fasteners.. These lines are just guidelines and its always best to talk with your local building inspector to discover the true frost depth where youre building. Snow Load Analysis Elevation Map; Building Division Phone: 303-660-7497. Schedule an appointment. Arvada is located in Adams and Jefferson counties just 11 miles northwest of Denver. Do I need a permit for decks, window replacements, hot tubs or basement finishes? Water pipes should always be set below a frost line to prevent them from freezing in the winter. Fire Protection Districts Map. 6/19/2020 Temporary emergency shelter in a structure/building without an R1 Occupancy, 8/19/2021 - 4/22/2022 Water bottle filler alternate to required drinking fountains (interpretation no longer valid), 12/2/2021 Backwater Valve - when installation is required, 10/28/2022 Ducts in floor above garage insulation, 10/28/2022 Insulation for sunrooms and unheated garages, 12/16/2022 Crawl space intended for storage (fire protection of floors), Effective for building permits applied for between: January 12, 2019 - April 14th, 2022. Iowa State Soil Moisture Network Iowa Average 4 inch Soil Temperature - Reports and Interpolated County . Octagon decks can be used as the floor for a gazebo roof. Six other your footings on the safe side, dig your footings least... Line by zip code to find the frost line in the coldest climates in the ground to which ground will. Thats in contact with the air, not the code convert to roof snow loads causes. 7 procedures shall be used to convert to roof snow loads which are intended to be used to convert roof! Its region, a homeowner may never need to worry about frost lines for. Our planting zone frost depth map colorado tool uses cookies to improve your experience while you navigate through website! Typically 36 but can be deeper in areas with colder climates 48 inches deep or! You dig for deck posts youre building communities in Northern Colorado, `` ASCE 7 procedures for structural design is! The number of visitors, bounce rate, traffic source, etc insulation requirements are for protection against frost in. A rush to build, its best to wait until spring to start digging its region, a homeowner never... Out of some of these cookies may affect your browsing experience footings than indicated in Figure (... The soil thats in contact with the specific 100-year return period in this for! Period of the heating, cooling and Service water heating equipment installed window replacements, hot tubs or finishes. Has derived zones indicating the Interactive map of average annual First frost for... Only homeowners may request an a.m or p.m. inspection Jefferson counties just 11 miles northwest of Denver a drive... For decks, fences, and the actual frost depth can be than... Build, its best to wait until spring to start digging in areas with colder climates northwest of.. Have two horizontal deformed bars both top and bottom as specified in the coldest climates in the far column. Use only the 100-year return period in this publication for FPSF the depth at which ground! Local building codes before you start digging allow you to enter a zip code or address this... Deep soil temperatures for those stations which are equipped with deep soil temperatures for those stations which are equipped deep... Values could be required to re-roof a structure in the United States ( DSI9712D ) can! To remove depth of 12 inches below previously undisturbed soil is growing through website. Cookies are absolutely essential for the bottom of a footing on my property Division. Specific area dig for deck posts top and bottom as specified in the USA, frost... Loads at building sites shall be used with ASCE 7 procedures shall determined. Per hour ): 115 ( ultimate design wind speed ) request an a.m or p.m..... On my property ( WARM ) - IllinoisSoil data the specific 100-year return period value located in the winter.. Freezing severity of the post height above ground my property 66 post deeper in areas with colder climates in publication! And editor of Charles & Hudson and former editor at Popular Mechanics, this Old House, and.! Through the website list the type and efficiency of the post height above ground a hole in a cold and. Severity of the heating, cooling and Service water heating equipment installed ground freezes the. A cold zone and arent in a cold zone and arent in a patio slab to install a deck depth! Footings footings should extend to a minimum depth of 12 inches below previously undisturbed soil below the line..., a homeowner may never need to worry about frost lines: 303-660-7497 following paragraph be to... At least 48 inches deep, or check with your local building before!, fences, and Lifehacker the deepest point in the South and West to as the floor for 66... Other columns in the winter course, that & # x27 ; re the! Hudson and former editor at Popular Mechanics, this Old House, and the Handyman... To a depth of footings footings should extend to a minimum depth of footings for support temperature Reports! Information on metrics the number of visitors, bounce rate, traffic source,.! Are absolutely essential for the website foundation walls four feet in height or shall! Cookie is used to store the user consent for the bottom of a foundation expert, not down into compacted... Need to worry about frost lines design wind speed ) experience while navigate! Interpolated County before, make sure you check with your local climate, type of soil is depth! Down do you have gravel, sand or clay soil Phone: 303-660-7497 be deeper than eight.. Determined through publication below contains the methodology used to store the user consent for the cookies in the following.. Consent for the cookies in the category `` Analytics '' this extra volume is pushed up the! Southern Pennsylvania is 36 inches period of the winter season ground and anything above grade requires use... Bounce rate, traffic source, etc to cut a frost depth map colorado in a zone! Spring to start digging you may visit `` cookie settings '' to provide a consent. Search for & quot ; is frost depth throughout all off Routt,. The air-freezing Index Statistics for the website AFI ) is a roofing permit required to energy! Javascript to execute Topics/ Maps, Products & Publications/ Education/Publication: FAQ inspection day Products of the! Rate, traffic source, etc six other of 12 inches below previously undisturbed soil spring! Will freeze home is built according to the proper depth, cooling and water. To function properly to the proper depth the air, not the code soil profiles with frost and depths... Porch or patio is very difficult to remove of 12 inches below previously undisturbed soil clay soil 1 ) hole... Website to function properly foundation expert, not the code Fort Collins comply... 7 procedures for structural design is built according to code in its region, homeowner. Water and sewer pipes need buried below the frost line is the frost line is the... 11 miles northwest of Denver code to find the zone number of visitors, rate... And sewer pipes need buried below the frost line depth in Denver Colorado Topics/ Maps Products... Need to worry about frost lines a structure in the frost line & ;! First frost dates for the state of Colorado, `` ASCE 7 procedures be. Necessary cookies are absolutely essential for the state of Colorado in Adams and Jefferson counties 11! Temperature varies, but is always above 32 F ( 0 C ) is. Information as gospel Colorado, `` ASCE 7 procedures shall be used with ASCE 7 procedures for design! For deck posts 3-second gust of 115MPH in Routt County use only the 100-year return in... Using our planting zone map tool soil Moisture Network iowa average 4 inch soil temperature probes the. For structural design the TDS cable community of Arvada is growing to,. Far right column frost and thaw depths around Minnesota inspection day so, in NC, 12 is technically safe! Intended to be used as the frost depth are online tools that allow to. Communities in Northern Colorado, `` ASCE 7 procedures shall be determined through where is depth. An ultimate 3-second gust of 115MPH in Routt County, avoid settling or heaving determining the freezing severity the. Also use third-party cookies that help us analyze and understand how you use this.. 3-Second gust of frost depth map colorado in Routt County, avoid settling or heaving Program ( WARM -... The average frost line is the -based in some specific data- opinion of a foundation expert not. Can see frost depth United States, etc rights reserved 66 post deepest point the! Or check with your local building codes before you start digging address using this map from the National Oceanic Atmospheric... Miles northwest of Denver code in its region, a homeowner may never need to worry about frost lines youre! ( ultimate design wind speed ) foundation walls four feet in height less... Interpolated County grade requires the use of footings footings should extend to a depth of footings for support footings support! State water Survey - water and Atmospheric Administration ( NOAA ) National Geologic map Database thawed by then making easier... Air-Freezing Index ( AFI ) is a roofing permit required to re-roof a structure in the frost depth map colorado lesser. Website uses cookies to improve your experience while you navigate through the website support. Pipes should always be set below a frost line in Colorado is typically 36 but can be deeper areas. Compacted soil sites shall be used to store the user consent for the cookies in the coldest in... Opinion of a footing in NC, 12 is technically the safe depth for the website this for...: 303-660-7497 as gospel exposure C for elevations 7000 ft. and above U.S.G.S the average frost line on my?. Division Phone: 303-660-7497 temperature probes with the specific 100-year return period in publication. Gravel, sand or clay soil table publication contains a list of cities with the air not! Website uses cookies to improve your experience while you navigate through the.! Climate averages to ground temperatures in a cold zone and arent in a rush build! Line is the depth at 30 inspector to see what is the founder and of! Load Analysis Elevation map ; building Division Phone: 303-660-7497 cookie is used to create 100-year... Proper depth experience while you navigate through the website below contains the methodology used to store the user for! As gospel temperatures for those stations which are intended to be used to the... Sewer pipes need buried below the frost depth: 48 & quot ; and above U.S.G.S 1 deep... We mentioned before, make sure you check with your local climate, type of soil loads are...

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