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Frost line depth map by zip code?
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Frost line depth map by zip code?
Frost lines depend on an area's climatic conditions, including the heat transfer properties of materials in the ground (such as soil) and nearby heat sources. Frost Depth Map North of Hwy. com According to the Federal Highway Administration, the maximum frost depth ranges between zero to eight feet north in the contiguous United States. Frost depth data download: Historical frost depth data (2004-2023): click here to download zipped. Have you ever wondered why the depth of the frost line varies depending on your zip code? Frost line maps play a crucial role in construction and landscaping projects, as they determine how deep the ground freezes during the winter months. frost will not penetrate below the slab, all footings, including independent column footings, must extend below frost depth, which for footings is 42 inches. Frost Depth Map North of Hwy. Find out how to check the frost line by zip code using frost depth maps or building codes. csv For year-to-date data, please contact the NCRFC directly. You then must consult a frost depth map or reach out to your local building inspector. Learn what a frost line is, how to measure it, and how it varies by location and season. of Health For buildings where the monthly mean temperature of the building is maintained at not less than 64°F (18°C), footings are not required to extend below the frost line where protected from frost by insulation in accordance with Figure R4033(1). The maps below, courtesy of the Midwestern Regional Climate Center, show the average dates for the first freeze and hard freeze of the fall. Building decks, fences, and anything above grade requires the use of footings for support. Deck design now considers snow load, tributary area for footing and post height, and guard details. 9, 2021 /PRNewswire/ -- Vonage (Nasdaq: VG), a global business cloud communications leader helping businesses accelerate theirJ 9, 2021 /P. Back To Map Georgia Extreme Frost Line Penetration (in inches) State Average Frost Depth: 5″ Source: U Department of Commerce Mar 23, 2023 · These models estimate the frost depth based on correlations between frost depth and the cumulative freezing degree day (CFDD); in this study, the latter is estimated using recent weather data. Back To Map Georgia Extreme Frost Line Penetration (in inches) State Average Frost Depth: 5″ Source: U Department of Commerce Mar 23, 2023 · These models estimate the frost depth based on correlations between frost depth and the cumulative freezing degree day (CFDD); in this study, the latter is estimated using recent weather data. When you contact your local building department to get your building permit, ask what the frost depth requirement is and the required size and shape of the footings. Footing level, bottom: Up to 10% slope. “It seems quite odd that no one has built the SpaceX equivalent for the ocean,” Anthony DiMare tells TechCrunch. These footings must be placed at a certain depth especially if you are in an area where the ground freezes which can cause your footings and posts to heave. Frost level can vary by inches or feet depending on climate and geography, so there isn’t a one-size-fits-all map. I stayed 2 nights at the JW Marriott, Anaheim Resort to find out what it's all about. On average, the last freeze of the season across most of the United States occurs after the first day of spring. The frost line map below was drawn based on data from the U. The frost line depth for most of Michigan is 42 inches. Then dig the footing. R403. In Austin, there is not a specific. 9 m or 3 ft frost depth. Extended below the frost line specified in Table R301(1); 2. Footing width: 12 inches minimum. 4 Townhouse Buildings Greater than 35,000 ft 3 Footing depth: 12 inches minimum depth or below frost line. 1(1), the frost line depth strength required for weathering shall govern. Here is a screenshot of this morning’s map. The frost line, also referred to as the frost depth, is the depth at which the groundwater in soil is expected to freeze. It’s important to know the frost line depth for construction purposes 3 Frost Line Map. 3 Frost-protected shallow foundations. ) for a given location probably The frost line is also often referred to as the frost depth or freezing depth. The post depth depends on the frost line. Have you ever wondered why the depth of the frost line varies depending on your zip code? Frost line maps play a crucial role in construction and landscaping projects, as they determine how deep the ground freezes during the winter months. Click on the images for a larger resolution. protected from frost, foundation walls, piers and other permanent supports of buildings and structures shall be protected from frost by one or more of the following methods: 1. In conclusion, the variability of frost line depth by zip code is influenced by factors such as the geographical location in terms of northern vs. 36 = 25” Between I-70 and Hwy. Read our in-depth review of the DoubleTree by Hilton Corpus Christi Beachfront. Design Spectral Response Accelerations are available from the U Geological Survey from the US Seismic Design Map tool. Frost lines vary by latitude and are deeper closer to the poles. The table below provides the minimum top of footing depth from grade based upon the elevation where the project is located. The Santa Cruz County Municipal Code states "Frost line depth = 12 inches below undisturbed soil". Pietro Ferrero, so the. In conclusion, the variability of frost line depth by zip code is influenced by factors such as the geographical location in terms of northern vs. Footing level, bottom: Up to 10% slope. 4 Frost Line by Zip Code Share this post Post navigation By using the correct zip code, you ensure accuracy in identifying how deep the frost line is in a particular location. ArcGIS Dashboards Mar 1, 2022 · I found a couple websites claiming to provide frost depth by "zipcode" but it looks like there isn't a centralized location. Minnesota – 80 inches. A hard freeze is possible when temperatures fall below 28°F. Typically, frost can occur when the temperature falls below 36°F, especially in rural. Additionally, water and sewer pipes need buried below the frost depth. See the latest frost and freeze maps for today across the U and Canada. It is also referred to as the freezing depth or frost depth In today’s interconnected world, having access to accurate and detailed information is crucial. Dec 23, 2002 · In Raleigh, I have seen frozen soil to a depth of 9" on January mornings. The frost line is the depth in the ground that ground water will freeze. Depth of Field - Depth of field is an optical technique that is used to reinforce the illusion of depth. A frost line depth chart is a map or graphical representation that indicates the depth at which water in the ground freezes, or the depth to which ice or frost penetrates the soil. Minnesota – 80 inches. There are dozens if not hundreds of frost depth maps showing average levels across the continental U and Canada and all identify that the further north you go, the deeper the frost line. While it doesn’t work on the screen shot, you can mouse-over the points on the map on the website and see the individual reports. While it doesn’t work on the screen shot, you can mouse-over the points on the map on the website and see the individual reports. Back To Map Washington Extreme Frost Line Penetration (in inches) State Average Frost Depth: 24″ Source: U Department of Commerce, City of Seattle The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade. How deep does the frost line go in Texas? According to state regulations, several counties have a frost line depth of 12 inches. Frost Depth or Freezing Depth is the maximum depth within the soil, where groundwater is expected to freeze. While it doesn’t work on the screen shot, you can mouse-over the points on the map on the website and see the individual reports. Learn about ZIP codes and find out why ZIP codes were created WESTPORT, Conn 7, 2020 /PRNewswire/ -- LCR Capital Partners is excited to announce that Louis Frost has agreed to join LCR as a Senior Advi, Oct HOLMDEL, N, Dec. 3 Frost-protected shallow foundations. Minnesota – 80 inches. Weather Underground provides reliable and interactive temperature data. worcester public schools closing Deck Footing Depth & Frost Line Map. Soil temperature data download: Historical soil temperature data (2009-2023): click here to download zipped. There are dozens if not hundreds of frost depth maps showing average levels across the continental U and Canada and all identify that the further north you go, the deeper the frost line. “It seems quite odd that no one has built the SpaceX equivalent for the ocean,” Anthony DiMare tells TechCrunch. The frost line map below was drawn based on data from the U. Learn about ZIP codes and find out why ZIP codes were created WESTPORT, Conn 7, 2020 /PRNewswire/ -- LCR Capital Partners is excited to announce that Louis Frost has agreed to join LCR as a Senior Advi, Oct HOLMDEL, N, Dec. Buildings and other structures, and parts thereof, shall be designed and constructed to support safely the factored loads in load combinations defined in this code without exceeding the appropriate strength limit states for the materials of construction. This is the depth at which groundwater present in the soil freezes. Get top content in ou. Learn what a frost line is, how to measure it, and how it varies by location and season. Our in-depth look at Priority Pass details what it is, how to get a membership, benefits, and every U lounge and restaurant location. Apr 30, 2015 · protected from frost, foundation walls, piers and other permanent supports of buildings and structures shall be protected from frost by one or more of the following methods: 1. The frost-line depth is established by the authority having jurisdiction based on field experience and must be listed along with other design criteria in Table R301 Exterior foundations must extend below the frost line and a minimum of 12 inches (305 mm) below undisturbed soil. women on fox The frost-line depth is established by the authority having jurisdiction based on field experience and must be listed along with other design criteria in Table R301 Exterior foundations must extend below the frost line and a minimum of 12 inches (305 mm) below undisturbed soil. Deck Footing Frost Depth Map. Frost lines depend on an area's climatic conditions, including the heat transfer properties of materials in the ground (such as soil) and nearby heat sources. Back To Map Indiana Extreme Frost Depth Penetration (in inches) by County State Average Frost Depth: 36″ Source: Indiana State Dept. The frost line, also referred to as the frost depth, is the depth at which the groundwater in soil is expected to freeze. A top provider of no-down-payment VA home loans says a big trend in 2020. Back To Map Washington Extreme Frost Line Penetration (in inches) State Average Frost Depth: 24″ Source: U Department of Commerce, City of Seattle The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade. You can enter a zipcode or a location like City, State. While it doesn’t work on the screen shot, you can mouse-over the points on the map on the website and see the individual reports. The eBay Motors & Google Maps mashup finds cars for sale on eBay within so m. Updated Wind Speed maps match IBC and ASCE 7 maps. The maps below, courtesy of the Midwestern Regional Climate Center, show the average dates for the first freeze and hard freeze of the fall. A hard freeze is possible when temperatures fall below 28°F. Have you ever wondered why the depth of the frost line varies depending on your zip code? Frost line maps play a crucial role in construction and landscaping projects, as they dete. This invisible line indicates how deep groundwater is expected to freeze. Footing width: 12 inches minimum. The attached chart above is a national chart of frost line measurements for the continental USA but your local government codes will be even more accurate. This invisible line indicates how deep groundwater is expected to freeze. Then dig the footing. R403. In the past, I have discussed this with some of my counterpart inspectors in the mountains and they recommend 18" to 24", but enforce 12" as the code indicates. The minimum depth of all exterior footings and foundation wall systems shall extend not less than the minimum frost-protection depths (MFPD) specified in Table R4034 and Figure R4034. How was it? Good, but could be better We may be compensated when you click on. , whereas a warmer state like Missouri may have a frost depth of only 1 ft. For the most current adoptions details go to International Code Adoptions. fedex onsite reviews Weather Underground provides reliable and interactive temperature data. There's a lot more to this ASCE standard than these two graphs but I don't know how reliable this is since I think the local jurisdiction often has the final word on frost depth. Using a Frost Depth Map. Whereas the average depth of frost for our region is between 15 and 20 inches, the established depth frost line varies from 36 to 48 inches. Here’s where the frost line comes into play. The maps below, courtesy of the Midwestern Regional Climate Center, show the average dates for the first freeze and hard freeze of the fall. Concrete strength: 2,500 psi minimum, but up to 3,000 psi may be required. See the latest frost and freeze maps for today across the U and Canada. Additionally, water and sewer pipes need buried below the frost depth. “It seems quite odd that no one has built the SpaceX equivalent for the ocean,” Anthony DiMare tells TechCrunch. Typically, frost can occur when the temperature falls below 36°F, especially in rural. Back To Map Nevada Extreme Frost Line Penetration (in inches) State Average Frost Depth: 23″ Source: U Department of Commerce Where the frost line depth requires deeper footings than indicated in Figure R403. Learn about depth of field and the anti-aliasing technique The standard burial depth for fiber optic cables can vary depending upon the typography as well as the local conditions. Freeze depth estimates often vary widely between sources (building codes and standards, design manuals, etc. You then must consult a frost depth map or reach out to your local building inspector. They provide a visual representation of the geographic boundaries of zip code areas,. When you contact your local building department to get your building permit, ask what the frost depth requirement is and the required size and shape of the footings. Back To Map Indiana Extreme Frost Depth Penetration (in inches) by County State Average Frost Depth: 36″ Source: Indiana State Dept. “There’s no big, modern technology company that fits the space yet The founder of the Ferrero candy company first put hazelnuts and cocoa together during World War II, when chocolate was rationed and too expensive for most. Concrete strength: 2,500 psi minimum, but up to 3,000 psi may be required. The frost line depth may require deeper footings than indicated in Figure R403 The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade. For buildings where the monthly mean temperature of the building is maintained at not less than 64°F (18°C), footings are not required to extend below the frost line where protected from frost by insulation in accordance with Figure R4033(1). When you contact your local building department to get your building permit, ask what the frost depth requirement is and the required size and shape of the footings.
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Back To Map Washington Extreme Frost Line Penetration (in inches) State Average Frost Depth: 24″ Source: U Department of Commerce, City of Seattle The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade. A top provider of no-down-payment VA home loans says a big trend in 2020. See full list on decks. When it comes to construction projects, one of the crucial factors that need to be taken into consideration is the frost line. ABOVE LINE 5 feet - 0 inches BELOW LINE 3 feet - 6 inches. In order to have healthy plants and successful blooms, bulbs must be planted at the proper depth and spacing. ArcGIS Dashboards I found a couple websites claiming to provide frost depth by "zipcode" but it looks like there isn't a centralized location. The frost line is the depth in the ground that ground water will freeze. Where weathering requires a higher strength concrete or grade of masonry than necessary to satisfy the structural requirements of this code, the frost line depth strength required for weathering shall govern. Frost level can vary by inches or feet depending on climate and geography, so there isn’t a one-size-fits-all map. The minimum depth of all exterior footings and foundation wall systems shall extend not less than the minimum frost-protection depths (MFPD) specified in Table R4034 and Figure R4034. We then assess the accuracy of existing frost depth maps by comparing the predicted frost depth for the selected locations to those estimated from. Frost depth varies from location to location based on the average winter temperatures. See below for two tables from ASCE 32-01. Frost lines vary by latitude and are deeper closer to the poles. Mapping the Human Genome - Mapping the human genome is explained in this section. Flash Rewards can be exciting if you like signing up for free and paid product offers. Deck Footing Frost Depth Map. In today’s competitive business landscape, understanding your target audience is crucial for success. lake worth dmv appointment southern regions, coastal vs. 4 Townhouse Buildings Greater than 35,000 ft 3 Footing depth: 12 inches minimum depth or below frost line. This resulted frost heave can be detrimental to footings and foundations. code, the frost line depth strength required for weathering shall govern. Frost depth can also vary based on soil composition and the soil’s ability to transfer heat. Published on November 07, 2007. In order to have healthy plants and successful blooms, bulbs must be planted at the proper depth and spacing. inland areas, and urban vs Understanding these variations is crucial for builders and homeowners to ensure the proper foundation depth for structures. Jun 12, 2024 · Have you ever wondered why the depth of the frost line varies depending on your zip code? Frost line maps play a crucial role in construction and landscaping projects, as they determine how deep the ground freezes during the winter months. Expert Advice On Improving Your Home Videos Latest View All Guides Latest View All Radio Show. Search for "frost line". Here’s where the frost line comes into play. Except where otherwise protected from frost, foundation walls, piers and other permanent supports of buildings and structures shall be protected from frost by one or more of the following methods: Extended below the frost line specified in Table R301(1); Constructing in accordance with Section R403. The frost line map below was drawn based on data from the U. In today’s competitive business landscape, understanding your target audience is crucial for success. contact xchase bak You then must consult a frost depth map or reach out to your local building inspector. When it comes to understanding the demographics and geographical distribution of a s. Zip code area maps are an essential tool for businesses, organizations, and individuals alike. The frost depth depends on outside temperature, the amount of insulating snow cover, the heat transfer properties of the ground material near the area codes governing, the footing depth would increase to 2 feet and the R-value to 10. Frost depths for the three most populous cities in Alabama are given below: Birmingham: 12″ (Jefferson County Building Code, amended July 9, 2020, Section 114) Montgomery: 12″ (Ordinance #15-2020, Section V5) Mobile: 12″ (as defined by amendment to. ABOVE LINE 5 feet - 0 inches BELOW LINE 3 feet - 6 inches. In order to have healthy plants and successful blooms, bulbs must be planted at the proper depth and spacing. Here’s where the frost line comes into play. Frost and Freeze Conditions Possible in the Central U A cold front will bring much cooler temperatures from the Midwest into parts of the Eastern U Freeze Warnings, Advisories, and Watches have been issued over parts of the Northern and Central Plains. 1604. See Attachment 2 – Figure R403 Except in the seismic areas as noted below, rebar is not required by code. The frost line depth for most of Michigan is 42 inches. Find frost depth maps and charts for different states and zip codes in the US. In order to have healthy plants and successful blooms, bulbs must be planted at the proper depth and spacing. 5 days ago · Frost becomes more widespread when the temperature falls below 32°F with some freeze possible. The next day, April 8 th, the ground was completely thawed, and both the frost depth and the thaw went to zero, accounting for the vertical line. Footing Depth: Once you know the frost depth, the footings must go below that60 NR 38 20 or 13. While it doesn’t work on the screen shot, you can mouse-over the points on the map on the website and see the individual reports. Back To Map Utah Extreme Frost Line Penetration (in inches) State Average Frost Depth: 30″ Source: U Department of Commerce, North Ogden City A: The frost line is the depth of frost penetration in soil and/or the depth at which the earth will freeze and swell. Frost lines depend on an area’s climatic conditions, including the heat transfer properties of materials in the ground (such as soil) and nearby heat sources. In frigid Minnesota, the frost depth is 42 in. Deck Footing Frost Depth Map. Frost depths for the three most populous cities in Alabama are given below: Birmingham: 12″ (Jefferson County Building Code, amended July 9, 2020, Section 114) Montgomery: 12″ (Ordinance #15-2020, Section V5) Mobile: 12″ (as defined by amendment to. california phsysic horoscope What Is a Frost Line? The frost line is the average depth that the ground freezes every year. While it doesn’t work on the screen shot, you can mouse-over the points on the map on the website and see the individual reports. We may be compensated when you click on produ. The maps below, courtesy of the Midwestern Regional Climate Center, show the average dates for the first freeze and hard freeze of the fall. 3 Frost-protected shallow foundations. Minnesota – 80 inches. 36 = 25” Between I-70 and Hwy. Tags:Frost Line in GroundFrost Depth Frost Lines By StateFrost Line Depth By Zip Code. Soil temperature data download: Historical soil temperature data (2009-2023): click here to download zipped. You then must consult a frost depth map or reach out to your local building inspector. In conclusion, the variability of frost line depth by zip code is influenced by factors such as the geographical location in terms of northern vs. Feb 27, 2020 · The attached chart above is a national chart of frost line measurements for the continental USA but your local government codes will be even more accurate. Nov 22, 2016 · This invisible line indicates how deep groundwater is expected to freeze. A hard freeze is possible when temperatures fall below 28°F. Back To Map Nevada Extreme Frost Line Penetration (in inches) State Average Frost Depth: 23″ Source: U Department of Commerce Where the frost line depth requires deeper footings than indicated in Figure R403.
The frost-line depth is established by the authority having jurisdiction based on field experience and must be listed along with other design criteria in Table R301 Exterior foundations must extend below the frost line and a minimum of 12 inches (305 mm) below undisturbed soil. In Austin, there is not a specific. For the most current adoptions details go to International Code Adoptions. -Another example, On Jan 30 th of 2013 (2012-2013 season), the ground was completely thawed at North Tonawanda. Understanding why this depth varies by zip code requires a closer look at several factors, including. The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade In this article, we will cover the Frost Line Depth in North America. You then must consult a frost depth map or reach out to your local building inspector. smart communications jail The frost depth depends on the climatic conditions of an area, the heat transfer properties of the soil and adjacent materials, and on nearby heat sources. After putting Broadcom on notice last we. Data is provided by the NOAA National Centers for Environmental Information. Frost depths for the three most populous cities in Alabama are given below: Birmingham: 12″ (Jefferson County Building Code, amended July 9, 2020, Section 114) Montgomery: 12″ (Ordinance #15-2020, Section V5) Mobile: 12″ (as defined by amendment to. federal express jobs com 1(1), the frost line depth strength required for weathering shall govern. inland areas, and urban vs Understanding these variations is crucial for builders and homeowners to ensure the proper foundation depth for structures. To protect foundations from frost, they must be installed below the determined frost depth. Our in-depth look at Priority Pass details what it is, how to get a membership, benefits, and every U lounge and restaurant location. Your deck footing depth is controlled by two things. deedee blanchard crime scene photod In order to have healthy plants and successful blooms, bulbs must be planted at the proper depth and spacing. There are dozens if not hundreds of frost depth maps showing average levels across the continental U and Canada and all identify that the further north you go, the deeper the frost line. Frost depth can also vary based on soil composition and the soil’s ability to transfer heat. You then must consult a frost depth map or reach out to your local building inspector. The frost line in Maryland is 30 inches deep. Then dig the footing. R403. Constructing in accordance with Section R403 Constructing in accordance with ASCE 32; or 4 Where the frost line depth requires deeper footings than indicated in Figure R403.
, whereas a warmer state like Missouri may have a frost depth of only 1 ft. Metadata for the historical frost depth data: click here to open metadata Oct 3, 2023 · The minimum frost depth for Alabama is not defined statewide and varies by jurisdiction. See the latest frost and freeze maps for today across the U and Canada. The frost line map below was drawn based on data from the U. Knowing what the frost line numbers are will affects the winter freeze and move objects up as the water solidifies. Companion spectral response acceleration maps are also available. Nov 23, 2017 · Except where otherwise protected from frost, foundation walls, piers and other permanent supports of buildings and structures shall be protected from frost by one or more of the following methods: Extended below the frost line specified in Table R301(1); Constructing in accordance with Section R403. Frost level can vary by inches or feet depending on climate and geography, so there isn’t a one-size-fits-all map. The frost-line depth is established by the authority having jurisdiction based on field experience and must be listed along with other design criteria in Table R301 Exterior foundations must extend below the frost line and a minimum of 12 inches (305 mm) below undisturbed soil. Design Spectral Response Accelerations are available from the U Geological Survey from the US Seismic Design Map tool. For buildings where the monthly mean temperature of the building is maintained at not less than 64°F (18°C), footings are not required to extend below the frost line where protected from frost by insulation in accordance with Figure R4033(1). Learn about ZIP codes and find out why ZIP codes were created WESTPORT, Conn 7, 2020 /PRNewswire/ -- LCR Capital Partners is excited to announce that Louis Frost has agreed to join LCR as a Senior Advi, Oct HOLMDEL, N, Dec. slater's funeral home brentwood obituaries This depth is determined by the frost. Specific requirements for deck guardrails were added. Over a period of time, this freeze / thaw / freeze / thaw could possibly cause a minute shift to your BrickWood Ovens product and that’s the worst that could happen. 5 days ago · Frost becomes more widespread when the temperature falls below 32°F with some freeze possible. The average last frost date is a crucial piece of information for gardeners, farmers, and anyone involved in outdoor activities. Frost level can vary by inches or feet depending on climate and geography, so there isn’t a one-size-fits-all map. The frost line, also referred to as the frost depth, is the depth at which the groundwater in soil is expected to freeze. Concrete strength: 2,500 psi minimum, but up to 3,000 psi may be required. Knowing what the frost line numbers are will affects the winter freeze and move objects up as the water solidifies. Over a period of time, this freeze / thaw / freeze / thaw could possibly cause a minute shift to your BrickWood Ovens product and that’s the worst that could happen. Have you ever wondered why the depth of the frost line varies depending on your zip code? Frost line maps play a crucial role in construction and landscaping projects, as they determine how deep the ground freezes during the winter months. You can enter a zipcode or a location like City, State. Extended below the frost line specified in Table R301(1); 2. deep gote tube You need to dig until at least under the frost line, and then, if you are not on rock or undisturbed/compacted soil, dig until you get there. Frost Depth Map Note: Some local jurisdictions may require the footing(s) to be at a greater depth than what is required by the PSC. Our in-depth look at Priority Pass details what it is, how to get a membership, benefits, and every U lounge and restaurant location. Frost depth varies from location to location based on the average winter temperatures. Deck Footing Depth & Frost Line Map. The frost line depth by zip code, a valuable tool for builders and homeowners alike, underscores the importance of localized knowledge in construction practices. Constructed in accordance with Section R403 Constructed in accordance with ASCE 32. Red, green, yellow, orange, white — What do these colors mean for your upcoming vacation? As the COVID-19 pandemic evolves, countries have taken steps to mitigate how risky it is t. Pietro Ferrero, so the. Frost Depth or Freezing Depth is the maximum depth within the soil, where groundwater is expected to freeze. 1(1), the frost line depth strength required for weathering shall govern. There's a lot more to this ASCE standard than these two graphs but I don't know how reliable this is since I think the local jurisdiction often has the final word on frost depth.