Frost line depth map wisconsin

How to Know the Frost Line Depth. If you live in a region with bitterly cold winters, the National Weather Service says your frost line can be as deep as six feet — or more! It is much shallower in warm regions like Arizona or South Florida. Take a look at our frost depth map above to see the frost line in your area.

For example, the frost line in Wisconsin will be much deeper than in a warmer state like North Carolina, so Wisconsin's building codes will require deeper footings. Checking the Frost Line: You can find out the specific requirements for your area by looking at a frost depth map or by checking with the local building department.Frost Depth Chart. A frost depth map exists a userful tool to supply you a roughen idea of how in-depth you need to jab toward the soil to get go where one grounded rarely freezes. Often, you’ll see contour lines for a frost-depth map where any point along that line represents the frost default in those towns and townships where the line crosses.In Wisconsin's DOC (Department Of Commerce) WCBC (Wisconsin Commercial Building Code) Chapter 18, which, reportedly, corresponds to The 2000/2006 International Building Code (IBC), there is a map, which, in comparison to the "Old" 42" code requirement, is impractically deeper.Wisconsin State Climatology Office. Weather and climate play a vital role in our state’s economy, agriculture, and recreation. As part of the Nelson Institute Center for Climatic Research, the Wisconsin State Climatology Office collects, analyzes, and shares climate information with our communities while leading the way in climate science ...By Staff Writer Last Updated December 10, 2023. WxMom/CC-BY-SA 2.0. The National Weather Service measures frost depth in Wisconsin from the beginning …This dataset includes frost tube data from 37 stations in the Upper Midwest (Minnesota, North Dakota, Wisconsin), USA. The responsible agency was the St. Paul District of the U.S. Army Corps of Engineers. These data were collected during 1971-1981 (no data for 1976/77) by cooperative observers who gathered the data for use in their spring run ...Mar 29, 2023 · Footing depth: 12 inches minimum depth or below frost line. Footing width: 12 inches minimum. Footing level, top: Always level. Footing level, bottom: Up to 10-percent slope. Spread footing: 6 inches thick minimum. Concrete strength: 2,500 psi minimum, but up to 3,000 psi may be required.Where the frost line depth requires deeper footings than indicated in Figure R403.1(1), the frost line depth strength required for weathering shall govern. The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade. c.

The minimum frost depth for Alabama is not defined statewide and varies by jurisdiction. 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 V.A.5) Mobile: 12″ (as defined by amendment ...An FPSF incorporates strategically placed insulation to raise the frost depth around a building, which allows for foundation depths as shallow as 16 inches even in the most severe climates (see Figure 1). ... AFI data and maps have been calculated using temperature data from the 1951-1980 and 1981-2010 Climate Normals. Cautionary Note When ...Wisconsin Frost Line. Back To Map. Wisconsin Extreme Frost Line Penetration (in inches) State Average Frost Depth: 65″. Source: U.S. Department of Commerce. U.S. FROST LINE MAP.Weathering Frost Line Depth Termite Decay Winter Design Temp Ice Shield Under-layment Flood Hazard Air Freezing Index Mean Annual Temp 30 110* B Severe 30" Slight None 1 No W.C.C. 1224 49 *3 Second Gust - Category II structures **Category I structure wind speed 103 mph 3 second gust ***Category III wind speed 112 mph 3 Sec Gust and Category ...F. Frost Line: See Table R301.2 (1). G. Termite - Site Specific: Moderate to Heavy. H. Ice Barrier Underlayment Required: See Table R301.2 (1). I. Flood Hazard - The Flood Plain Administrator is the Director of Coconino County Community Development. ADOPTED CODES - Ordinance 2019-10 A. 2018 International Building Code

The frost line—also known as frost depth or freezing depth—is most commonly the depth to which the groundwater in soil is expected to freeze. The frost depth depends on the climatic conditions of an area, ... Map of frost penetration depths for Southern Ontario. Ottawa: 1.8 metres (5.9 ft) ...Within 1 mile of the coastal mean high water line where the ultimate design wind speed, Vult, is 130 mph or greater. 2. In areas where the ultimate design wind speed, Vult, is 140 mph or ... Footings must extend below the frost depth Exterior footings 12" below undisturbed ground level Detrimental materials removed prior to placing concrete ...To view daily maps from previous years, click the Archive button to the right of your format of interest. Note that images are numbered with the year followed by the Julian Date, essentially counting the number of days of the year from January 1 (Julian date = 001) to December 31 (Julian date = 365). Right-click any image to download it.Frost line depth. Termite. 25. 98. Yes. No. No. D2. ... The basic wind speed is determined from the basic wind speed map in Figure R301.2(2). Wind exposure category shall be determined on a site-specific basis in accordance with Section R301.2.1.4. c. Topographic effects (Wind Speed-up Kzt factor) shall be determined on a site-specific basis in ...The line varies by latitude, it is deeper closer to the poles. Per Federal Highway Administration Publication Number FHWA-HRT-08-057, the maximum frost depth observed in the contiguous United States ranges from 0 to 8 feet (2.4 m). Below that depth, the temperature varies, but is always above 32 °F (0 °C).

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1 Also see s. SPS 322.33 for additional slab-edge insulation requirements. 2 Units are degrees Fahrenheit. See estimate provided on Mean Annual Temperature Contour Map. 3 Air freezing index shall be based on maximum year expected for a 100-year return period. See estimate provided on AFI Contour Map. 4 Ground insulation to the building interior ...Back To Map Alabama Extreme Frost Line Penetration (in inches) State Average Frost Depth: 6″ Source: U.S. Department of Commerce, City of MobileWhat lives ampere Frost Line. The frost family is the depth at which the ground freezes. It's important to know the frost line depth for construction applications. ... This graph is from the National Snow press Polar Data center and shows to frost line map across the United States. Note like it moves down from 72-inch depth to a 6-inch depth ...The frost line depth may require deeper footings than indicated in Figure R403.1(1). The jurisdiction shall fill in the frost line depth column ... FBFM, or other flood hazard map adopted by the community, as may be amended. i. In accordance with Sections R905.2.7.1, R905.4.3, R905.5.3, R905.6.3, R905.7.3 and R905.8.3, for areas where the ...The New Brunswick frost line is the depth that water in the ground freezes to in winter. The line varies depending on soil type, geology, and weather conditions. Where there is soil with organic material such as topsoil, a few feet below the surface, this depth can be as much as 1 metre (3.2 ft) or more near Fredericton or Saint John. ... Generally, …

You have a small 20% chance of getting 32° by October 1. There is a 50% chance of being hit by a 32° frost starting around October 10. You have a 80% chance of seeing 32° by October 20. Said another way, you have a 1 in 5 chance at making it to that day without a 32° night. In the Fall.State and local governments throughout U.S are still introducing small business grant programs. Here are some of the current small business grants available. State and local govern...The winter of 2013 - 2014 was especially cold and the frost line reached a depth of 15 feet in some areas of Chicago. The average frost line in Chicago is about 7 feet per winter. This answer is:12" to 18". PEX pipes and all underground piping should be buried at least 12" to 18" below the frost line to protect the pipes from freezing. The frost line refers to the furthest depth underground groundwater begins to freeze, also called the frost depth.City of Minot 1025 31st Street SE - Office Address PO Box 5006 - Mailing Address Minot, ND 58702-5006 . APPLICABLE CODES . 2021 International Building Code 2021 International Residential CodeWisconsin State Climatology Office. Weather and climate play a vital role in our state’s economy, agriculture, and recreation. As part of the Nelson Institute Center for Climatic Research, the Wisconsin State Climatology Office collects, analyzes, and shares climate information with our communities while leading the way in climate science ...Rhode Island Frost Depth Map. Figure 1609 (B) from the SBC-1 (2013) RI State Building Code.Re: correct depth of footings Water expands 9% by volume when frozen at a force of 150,000# per sq in.It doesn't take alot of frozen ground to raise a footing (and the building on top of it ) if the ground underneath of the footing freezes. You can artificially change the freeze line by using a frost protected foundation which relies on rigid insulation to keep ground heat from escaping and ...Back To Map Mississippi Extreme Frost Line Penetration (in inches) State Average Frost Depth: 8″ Source: U.S. Department of Commerce

How to Know the Frost Line Depth. If you live in a region with bitterly cold winters, the National Weather Service says your frost line can be as deep as six feet — or more! It is much shallower in warm regions like Arizona or South Florida. Take a look at our frost depth map above to see the frost line in your area.

Midwest Regional Climate Center data: 2" and 4" soil temperature (24-hr and 7-day) Current soil temperature (24-hr period) Soil temperature climatology tool (warms-above and cools-below dates) Freeze date tool. Illinois State Water Survey - Water and Atmospheric Resources Monitoring Program (WARM)- IllinoisSoil Data.Great Plains Satellite. - Pacific Northwest Satellite. - Cent. West Coast Satellite. - Southwest Satellite. Viroqua, WI 54665 Weather. Wisconsin Snow Forecast. 54665 Area Snow Depth Reports. (most recent in last 48 hours)0:03. 1:26. The National Weather Service issued an overnight frost advisory Sunday for much of northern Wisconsin but said the cold spell will be brief. The frost advisory covers "a good chunk" of ...e.g. 53215 snow. Wisconsin Snow Forecast. Wisconsin 24 hr New Snow Accumulation Analysis. U.S. Snow Depth. SELECT BOX EXAMPLES. for LOCAL WEATHER: additional OPTIONS: City, ST -or- ZIP code -or- ST.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. Find slab and foundation contractors near me. Figure 1 shows an FPSF and a conventional foundation. An FPSF incorporates strategically placed insulation to ...Dec 28, 2021 · The best solution to quickly thawing frozen ground is Powerblanket ground thawing blankets. A ground thawing blanket has heating elements that heat up to 150°F (65.5°C) and uses a standard electrical plug. The heat penetrates to a depth of 12 to 18 inches every 24 hours, depending on the soil and ambient temperatures.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). Anchorage shall be in accordance with Section R403.1.6, Figure R404.1.5.3, or as specified by engineered design accepted by the building official.About Frost Maps. Plantmaps maintains Frost data and maps for many regions on the earth. We've created Average First Frost Dates, Average Last Frost Dates and Average Number of days with Frost maps for most US States and Candian Provinces. Plantmaps also created maps for many countries around the world that are in latitudes where frost …January 30, 2024. LANSING, Mich. ­- The Michigan Department of Transportation (MDOT) and local agencies are enacting spring weight restrictions, an annual move to protect roads. Effective 6 a.m. Friday, Feb. 2, weight restrictions will be imposed and enforced on all state trunkline highways in the entire state of Michigan.

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Back To Map Wisconsin Extreme Frost Line Penetration (in inches) State Average Frost Depth: 65″. Source: U.S. Department of Commerce ... → Check Latest Keyword Rankings ←It’s worth noting that the number provided is the frost line in inches; your footings will need to be placed below that number. So grab a measuring tape and get ready to find out how deep you need to dig to place your deck footings! We have listed the states from the deepest frost line to the shallowest. Alaska – 100 inches. Minnesota ...1. The USDA Hardiness Zone Method. To find the average frost dates for your region, you first need to determine your hardiness zone or planting zone. You can do this by using our planting zone map tool. Click on your state to zoom in or enter your zip code to find the zone number of your specific area. Frost dates can vary widely within each ...SPS 321.16 SPS 321.16Frost protection. SPS 321.16 (1) (1)General. SPS 321.16 (1) (a) (a) Footings and foundations, including those for landings and stoops, shall be placed below the frost penetration level or at least 48 inches below adjacent grade, whichever is deeper, except as allowed under sub. (2).Road map. Detailed street map and route planner provided by Google. Find local businesses and nearby restaurants, see local traffic and road conditions. Use this map type to plan a road trip and to get driving directions in Wisconsin. Switch to a Google Earth view for the detailed virtual globe and 3D buildings in many major cities worldwide.World Map » USA » State » Wisconsin » Large Detailed Map Of Wisconsin With Cities And Towns. Large detailed map of Wisconsin with cities and towns Click to see large. Description: This map shows cities, towns, counties, interstate highways, U.S. highways, state highways, main roads, secondary roads, rivers and lakes in Wisconsin.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. So, the frost line is a "safe" distance beneath the surface of the ground where soil and anything layed within it will not be affected by freezing temperatures. Likewise, how deep is the frost line in ...What is Frost Depth? Frost depth (or the "frost line") is the depth in the soil above which water may freeze during the winter. ... basis, and others have specific frost depths per jurisdiction. See the image at right for the Utah residential frost depth map. ... The minimum frost depth in Wisconsin is 48″ (One- & Two-Family Uniform ...The depth at which water freezes is called the "frost line" or the "frost depth." You can identify this level in your area using various online or local resources. ... The National Snow & Ice Data Center maintains a map that approximates the frost depth for large swaths of the United States. Frost depth ranges from just 6 inches in the South ...Pics Photos - 3d Framed Lake Maps Bathymetric Topographic Wood Lake Map. Check Details. Map by: Wisconsin Buffer Initiative. Check Details. Wisconsin Frost Line Depth Map - New River Kayaking Map. Check Details. Fox River Depth Map - Living Room Design 2020 ….

Frost Depth in Minnesota for Winter 2018. Frost depth varies across the state in January 2018, but is generally deeper than it was last two years. The map on the right depicts the depth that the ground is frozen under sod across the state. The frost depth is measured by a simple instrument called a frost tube.Small sheds need a gravel pad 4" deep (no shed footings required). Medium shed footings may be 12" deep (or not required at all in some areas). Large shed footings should extend 12" below the frost line (meaning a depth of 24", 36", 48", or more depending on the local climate). However, these are very general guidelines.Concrete shall have a minimum specified compressive strength of f' c, as shown in Table R402.2. Concrete subject to moderate or severe weathering as indicated in Table R301.2(1) shall be air entrained as specified in Table R402.2. The maximum weight of fly ash, other pozzolans, silica fume, slag or blended cements that is included in concrete mixtures for …Administrator’s Office P.O. Box 7965 Madison, WI 53707-7965. Governor Tony Evers Secretary Craig Thompson. wisconsindot.gov. Telephone: 608-266-8488 Email: [email protected]. FROZEN ROAD DECLARATION, MID SEASON THAW, ENDING THE DECLARATION, AND SPRING WEIGHT RESTRICTION DECISION PROCESS.Northern Wisconsin Snow Depth. This map is created using observed snow depth from National Weather Service trained observers, satellite information and aerial snow surveys. This map is a product of the National Operational Hydrologic Remote Sensing office located in Chanhassen, MN. Note: Snow depth values may be derived from yesterdays reports ...Building Services Division Timothy Wegner, Chief Building Official 3091 County Center Drive Auburn, CA 95603 (530) 745-3010 office (530) 745-3058 fax placer.ca.govSPS 382.30(11)(c)3.c. c. Lightweight insulating concrete shall be installed to the depth of the spring line of the sewer and shall extend laterally at least 6" on both sides of the sewer. The minimum thickness of the insulating concrete shall be determined from Figure 382.30-1 and Table 382.30-5.R403.3 Frost-protected shallow foundations.. For buildings where the monthly mean temperature of the building is maintained at a minimum of 64°F (18°C), footings are not required to extend below the frost line when protected from frost by insulation in accordance with Figure R403.3(1) and Table R403.3(1).Foundations protected from frost in accordance with Figure R403.3(1) and Table R403.3(1 ...To get frost heaves you need water, frost-suspectible soils (with silt or clay in it), AND freezing temperatures. Eliminating any one eliminate frost heaves. Putting your foundation deep enough simply avoids the freezing temperatures by getting below the seaonally active zone. But it does it in a pretty dumb way. Frost line depth map wisconsin, 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 R403.3(1) and Table R403.3(1)., Lookup your first and last freeze/frost dates by zip code. Want to know when to expect your last frost of the spring, or the first frost of the fall? Enter your zip code (or City, State) below and we'll tell you what we know. Our information is taken directly from the National Weather Service and depending on the location of the reporting ..., Re: correct depth of footings Water expands 9% by volume when frozen at a force of 150,000# per sq in.It doesn't take alot of frozen ground to raise a footing (and the building on top of it ) if the ground underneath of the footing freezes. You can artificially change the freeze line by using a frost protected foundation which relies on rigid insulation to keep ground heat from escaping and ..., In many areas, frost depth exceeds 42", resulting in footings far deeper than those needed structurally. ... Then cross-reference your findings with the Air-Freezing Index map. For example, looking at the Air-Freezing Index map, you will notice that most of the Front Range of Colorado, all of Nebraska, Illinois, and even northern Michigan lie ..., The frost line, also known as the frost depth, represents the depth at which the ground typically freezes during the winter months. How deep does a pipe need to be not to freeze? The International Plumbing Code states that “Exterior water supply system piping shall be installed not less than 6 in. (152 mm) below the frost line and not less ..., ABOVE LINE 5 feet - 0 inches BELOW LINE 3 feet - 6 inches . Title: FROST DEPTH MAP Created Date: 3/9/2007 2:13:25 PM ..., Back To Map Utah Extreme Frost Line Penetration (in inches) State Average Frost Depth: 30″ Source: U.S. Department of Commerce, North Ogden City, The guideline makes sense until you realize that 1/3 of the above ground height is a solid 2 feet above the frost line; the depth that many other guides say to go down to. - Shnibble. Jul 25, 2022 at 23:13. I did a fence for a cow for a friend and put 4ft of 8" square post in the ground for a 5ft post height ie it was 9ft long. These were the ..., Routine observations of ground frost depth were made by members of the Illinois Cemetery Association for 16 consecutive winters (1980-96). Maps of average and extreme depths are presented. Ground frost is generally found in northern Illinois by late November, continuing until mid-March or early April In southern Illinois, a continuous, 581. SXUS53 KMKX 231444 CCA. HYDMKX. Wisconsin Max/Min Temperatures and Precipitation By Area. National Weather Service Milwaukee/Sullivan Wisconsin. 905 AM CDT Thu May 23 2024. Unless otherwise noted, data from individual observers is for the. 24 hours ending around 7 AM today. The ending time of the 24 hour., Back To Map Utah Extreme Frost Line Penetration (in inches) State Average Frost Depth: 30″ Source: U.S. Department of Commerce, North Ogden City, What lives ampere Frost Line. The frost family is the depth at which the ground freezes. It's important to know the frost line depth for construction applications. ... This graph is from the National Snow press Polar Data center and shows to frost line map across the United States. Note like it moves down from 72-inch depth to a 6-inch depth ..., A Builder’s Guide to Frost Protected Shallow Foundations 1 Background A frost protected shallow foundation (FPSF) is a practical alternative to a deeper, more-costly foundation in cold regions with seasonal ground freezing and the potential for frost heave. The International Residential Code ® (IRC) includes prescriptive methods for ..., 72” (1.8m) 10” column+30”x30” pad. Saskatoon. 96”. 8” Diameter. As you can see in Canada, the required footing depth varies from 18” to 96” below grade. Our vast countries has many different frost levels. This varying in frost level affects how deep the deck footings will need to be dug in., Predicting the frost depth of soils in pavement design is critical to the sustainability of the pavement because of its mechanical vulnerability to frozen-thawed soil. The reliable prediction of frost depth can be challenging due to the high uncertainty of frost depth and the unavailability of geotechnical properties needed to use the available empirical- and analytical-based equations in ..., Sep 27, 2023 · The winter of 2013 - 2014 was especially cold and the frost line reached a depth of 15 feet in some areas of Chicago. The average frost line in Chicago is about 7 feet per winter. This answer is:, Frost Line Depth: 18 inches; Termite: Moderate to Heavy; Winter Design Temperature. 16 degrees. Ice Barrier Underlayment Required. Yes. Flood Hazards. 8/28/2008 - Effective date. FHBM identified 11/22/1974. Air Freezing Index. 300. Mean Annual Temperature. 56, R403.3 Frost-protected shallow foundations.. 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 R403.3(1) and Table R403.3(1).Foundations protected from frost in accordance with Figure R403.3(1) and Table R403.3 ..., 1 Also see s. SPS 322.33 for additional slab-edge insulation requirements. 2 Units are degrees Fahrenheit. See estimate provided on Mean Annual Temperature Contour Map. 3 Air freezing index shall be based on maximum year expected for a 100-year return period. See estimate provided on AFI Contour Map. 4 Ground insulation to the building interior ..., Back To Map Mississippi Extreme Frost Line Penetration (in inches) State Average Frost Depth: 8″ Source: U.S. Department of Commerce, Frost Line Penetration Map In The U.S. The frost line is simply the deepest point in the ground to which ground water will freeze. It’s also referred to as the frost depth. When water changes from liquid to solid, it expands 9% in volume. This resulted frost heave can be detrimental to footings and foundations., What is Frost Depth? Frost depth (or the "frost line") is the depth in the soil above which water may freeze during the winter. ... basis, and others have specific frost depths per jurisdiction. See the image at right for the Utah residential frost depth map. ... The minimum frost depth in Wisconsin is 48″ (One- & Two-Family Uniform ..., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., To prevent this phenomenon, one must set the fence post deeper than the frost line, or the maximum depth at which soil freezes. The National Snow and Ice Data Center publishes a map of the average winter frost lines in the United States. How to consult local laws. Often, local governments factor in these conditions and regulate minimum footing depth. Cities …, The depth of frost penetration depends on the soil type, the severity of the winter, the amount of water in the soil and the depth of an insulating blanket of snow. The frost depth varies by region. In frigid Minnesota, the frost depth is 42 in., whereas a warmer state like Missouri may have a frost depth of only 1 ft., The frost line, also known as the frost depth, represents the depth at which the ground typically freezes during the winter months. How deep does a pipe need to be not to freeze? The International Plumbing Code states that “Exterior water supply system piping shall be installed not less than 6 in. (152 mm) below the frost line and not less than 12 in. (305 …, This map shows the frost line depth for each state. Share. Improve this answer. Follow answered Jul 14, 2016 at 0:08. first1pass first1pass. 41 1 1 bronze ... The Santa Cruz County Municipal Code states "Frost line depth = 12 inches below undisturbed soil". Search for "frost line". Share. Improve this answer. Follow, From: DISTRICT OF COLUMBIA CONSTRUCTION CODES SUPPLEMENT OF 2008 DCMR 12A BUILDING CODE SUPPLEMENTCHAPTER 18A SOILS AND FOUNDATIONS SECTION 1805A FOOTINGS AND FOUNDATIONS Delete Section 1805.2.1 ..., The frost line in Indiana is the depth that groundwater in the soil freezes during the winter. The frost line depth in Indiana ranges from 30 to 60 inches, with 30 inches being the..., Frost Line Depth in New York State. The frost line depth in New York state varies from region to region. The depth ranges from 32 to 60 inches, with the average depth being around 40 inches. The Adirondack region has the deepest frost line in the state, while the coastal areas have a shallower frost line. It is essential to know the frost line ..., The Frost line in Wisconsin is 65 inches. What’s the maximum depth of the frost line? This map is courtesy of the Brickwood Box and shows the frost line across the United States. 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 …, 72" (1.8m) 10" column+30"x30" pad. Saskatoon. 96". 8" Diameter. As you can see in Canada, the required footing depth varies from 18" to 96" below grade. Our vast countries has many different frost levels. This varying in frost level affects how deep the deck footings will need to be dug in., from the Weathering Probability Map [Figure R301.2(3)]. 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. The frost line depth may require deeper footings than indicated in Figure R403.1(1). The jurisdiction shall fill in the frost line depth column