By the end of the 19th century, America had built its first concrete bridge (the Alvord Lake Bridge in San Francisco, California) and its first concrete street (in Bellefontaine, Ohio, and it is still around today). Somewhere in the middle you realize you have only one bag left. Concrete, Repairing Concrete Weight per Cubic Foot A solid slab of concrete weighs 150 pounds per cubic foot. Given the volume we just calculated, and the concrete's density (again, you'll find this info on the bag, we provided a common value, but it varies), you can calculate the weight of all your elements. Use the slab calculator to figure the concrete needed for the porch surface. The existing pad is like 5 ft wide at least and a good 3 or 4 maybe more ft deep. Double Bolted Joints You don't need to worry though, you can input whatever units you like into the calculator and we'll do all the converting for you! So it is important to check a variety of spots on your footing and get an average size. You are having to pay for this concrete after all. If you decide to do all the work yourself, the cost of a 2040-foot concrete slab may cost between $2,264 and $4,376. Calculate and get an answer of 0.08 cubic yards for one concrete tube. To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield. Allowable antenna areas assume all round antenna members. Overloaded towers . An 80 lb bag (36.3 kg) of concrete mix yields approximately 0.60 cubic feet (17L) of concrete. QUIKRETE '); This concrete calculator allows you to estimate how much concrete you need for a specific area and how many bags of cement are required for this space, accounting for concrete density, weight, and spillage. My advise, get the model, get the specs, get a baseplate and proper foundation according to height. The average truck holds between 9 and 11 yards total. ProductDirectory +'::'+invisible+'::'+rn+"::"+escape(base.URL); Q: First of all Thanks to both you that answered so far. Pre-mixed concrete is usually sold by the cubic yard, and this unit is used by default. Guide, Hardscapes Sands, Stones, Pebbles & Rocks, DATA This totals .11 cubic yards. your wall with QUIKWALL tubes of Coat: Over 1/2 inch Thick Bond Coat Directly Over Masonry If there are three steps leading up to a porch: This porch has 9 sq. calculator Designs assume transmission lines symmetrically placed as follows: Ready mixed concrete by the yard is good for: If youre planning to order concrete from a ready mix supplier, theyll need to know how many yards of concrete to deliver. Heavyweight concrete consists of heavy natural aggregates, such as magnetite (up to a 60% increase in density) or barites (up to a 45% increase in density), or manufactured ones: iron or lead shot (between a 68-154% increase in density). Each section contains all required nuts and bolts shipped with each section. extra. I would highly suggest not "burying" a section of tower into concrete. What are the components of concrete? You can find some of the types below: Ordinary or plain concrete - one of the most commonly used. https://www.youtube.com/watch?v=M7nIEwPTGC4 --~--PART 2 conclusion! This is an approximate time. By using the G-Series tower as a self-supporting structure, you minimize land area usage. The calculator will indicate the number of bags you So enter in the footing calculator, 6" depth by 12" width (always figure steps with a 12" width) by 9' length. To figure out how much concrete you need to buy, you simply need to multiply the volume required by the density of the concrete mixture. Subscribe now A perfectly placed order of concrete will finish the job with a small amount left over. inch x 4 inch x 8 inch stone over a square section, To learn more about cubic yards, visit our cubic yard calculator. ","groupingsymbol":"","readonly":true,"hidefield":false,"fBuild":{},"parent":"","predefinedClick":true},{"dependencies":[{"rule":"","complex":false,"fields":[""]}],"form_identifier":"","name":"fieldname5","shortlabel":"","index":4,"ftype":"fCalculated","userhelp":"","userhelpTooltip":false,"csslayout":"","title":"40Lb bags needed","predefined":"","required":false,"size":"medium","eq":"(fieldname1*27)\/.3\n","suffix":"","prefix":"","decimalsymbol":". Joint Sealant or This was supposed to be a 12*12 footing, but note how the left side of the footing has collapsed. of bags you What are your soil conditions? (All yields As a Free-Standing, Self-Supporting Structure, a 70, 80 or 90 MPH rated 25G Tower can rise to a maximum of 40 feet. will The 25AG2 Top Cap Tower Section is the standard top section for the 25G Tower Series. Cubic 6. Written by HomeAdvisor. Warranty. and place 3 feet in the ground). A mixture overloaded with cement paste will be easy to place and will create smooth surface but will result in uneconomical concrete, susceptible to cracking. This 12" x 12" footing needs to be calculated 12" x 16" so the footing is figured to go above grade to reach the 4" slab thickness. Joints, Sealing After setting the wastage percentage, our calculator will then provide you with either the total number of premixed concrete bags needed or the volume of each concrete component (depending on what you chose in step 4). Through a process called hydration, the cement and water harden and bind the aggregates into a mass similar to a rock. So, if you divide 27 cubic feet by 0.60, you will get 45 bags. If you order 1-5 cubic yards, order .5-1 c.y. approximate and do not To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield. stone.). a) Borings should be taken at tower legs for self-supporting towers and at the base and anchor points for guyed towers. Once the ingredients are mixed, workers must cast the concrete in place before it hardens. From the sounds of it, this tower has possibly been abused or reutilized several times over the years. Dewatering or site drainage requirements applications to cover Discuss any variances with the supplier. See ROHNs standard design to help identify the right structure for your project. +'x'+screen.height+'::'+screen.colorDepth+'::'+escape(page_name) Title: 25SS035.pdf () Author: cwestermann Created Date: 4/14/2015 2:27:37 PM Keywords () Sometimes you'll know how many slabs you need. Note that the short concrete base can only be connected one ONE end. In my not so humble opinion, I don't think I would want to install a used tower unless I had the correct mounting base from the manufacturer. Odd shapes:Transform odd shapes into rectangles and odd shapes are suddenly easy to figure. and do not include allowance for uneven subgrade, inch or approximate and do not allow o Cross bracing is formed by a continuous solid rod bracing in a zig-zag pattern for strength. It is composed of fine and coarse aggregate bound together in a fluid cement (cement paste) that hardens over the time. This 25G Tower is to be used in a Self-Supporting Configuration according to Use and Foundation Specifications. Calculate the true width. Approximately 160,000 cubic yards . Cement is one of the ingredients of concrete. Calculate the true width. Someting that may look like a little surface rust on the outside, but rotted on the inside. Figure depths and widths as they have been built on the site, not simply what the plans say. A perfectly placed order of concrete will finish the job with a small amount left over. It can be upsetting to end up with any extra concrete. Water The day's already over, the shop is closed, work's not done and tomorrow you need to go back to the shop again. High-density concrete - also called heavy weight. var ui='palco';var al='Web-Stat hit counters'; // Modern concrete was invented in 1824 by Joseph Aspdin. The average cost of a concrete slab (6 inches thick) is $5.00-5.50 per square foot, including materials and labor. Soil classification and elevations If you are determined to have it be free standing without any sort of guying or bracing, be sure to go over every weld to ensure there are not cracks. Additional information to aid foundation designer Figure driveway 14' x 20' and your estimate will be good. var framed = 'no'; should be one-half of the above-ground *See Rohn 25G Guides for Specifications and Installation Requirements. Ready-mix - prepared in concrete plants and transported via concrete mixer trucks to allow for delivery prior to setting time. You'll never have to wonder "how much concrete do I need?" a 2", Here is why: The driveway is 16 at the top and 12 at the bottom. Premixed concrete is usually sold by the cubic yard or cubic meter (the latter is the volume unit we have set by default), but we usually measure construction elements in feet or centimeters. You can also check out our asphalt calculator to learn more about pavements and asphalt in general. Alot of trees couple close to were the tower would be and most of the surrounding woods anywhere from 50 to 200 feet depending on direction. Now we multiply 4 times (333). Do what the manufacturer says. QUIKRETE! So let's say we have two concrete columns, both 1 foot (30.5 cm) in diameter and 4 feet (122 cm) tall. 1/2", Ready mixed concrete by the yard is good for: If youre planning to order concrete from a ready mix supplier, theyll need to know how many yards of concrete to deliver. o Completely hot-dip galvanized after fabrication to provide absolute corrosion protection. Now, the total weight of concrete you need is shown. The tower was exactly as as described and arrived quickly and undamaged. ","groupingsymbol":"","readonly":true,"hidefield":false,"fBuild":{},"parent":""}],{"0":{"title":"Columns Concrete Calculator","description":"","formlayout":"top_aligned","formtemplate":"cp_cff_clean","evalequations":1,"evalequationsevent":2,"autocomplete":1,"persistence":0,"customstyles":""},"formid":"cp_calculatedfieldsf_pform_3"}]; Heres what the math looks like for a 10 by 10 concrete patio: Essentially you are solving for volume and then converting to cubic yards. Determine how thick you want the concrete, Measure the length and width that youd like to cover, Multiply the length by the width to determine square footage, Convert the thickness from inches to feet, Multiply the thickness in feet by the square footage to determine cubic feet, Convert cubic feet to cubic yards by multiplying by .037, Pouring small slabs for sidewalks or patios, Making repairs to foundation walls, walkways or steps, Footings for decks, pergolas, walls and more, Large patios, driveways, pool decks and more. Search for Products | FAQs | The average truck holds between 9 and 11 yards total. Concrete is usually ordered in cubic yards, but if you're looking for concrete weight it varies depending on the type of mix being used. ","groupingsymbol":"","readonly":true,"hidefield":false,"fBuild":{},"parent":""},{"dependencies":[{"rule":"","complex":false,"fields":[""]}],"form_identifier":"","name":"fieldname7","shortlabel":"","index":5,"ftype":"fCalculated","userhelp":"","userhelpTooltip":false,"csslayout":"","title":"60Lb bags needed","predefined":"","required":false,"size":"medium","eq":"(fieldname1*27)\/.45\n","suffix":"","prefix":"","decimalsymbol":". This tower was perfect for the client. It also has high fire resistance, has better shock and sound absorption, and is characterized by reduced shrinking. Rock quality designation (RQD) and percent rock sample recovered Discover magazines for computer and electronics enthusiasts. Pinned bases may not be used. Good luck on the project, it is a good price for the tower; be safe with it's disassembly, relocation and installation. How toOrder Welcome to the concrete column calculator - a column version of the concrete calculator. Many ready mix companies will have a minimum order of 1 yard, and will charge shortage fees when ordering partial batches. (All yields are 5. a b) The following items should be discussed in the geotechnical report: 1. Maximum suggested weight for climbers is 250 lbs, Seller Triangular Design you will *Per Rev G requirements, any structure greater than 10 ft requires a climber safety device. All Rights Reserved. of Each larger model allows for more loading capacity. Site access and potential construction difficulties on QUIKRETEproducts. cubic yards and concrete bags needed to complete your project. We can do this by dividing the volume by the sum of the terms in the ratio. Experienced contractors usually assume 5-10%. sand box at Portland cement is not a brand name - that is the generic term for the type of cement used in basically all concrete (like how stainless is a type of steel). We need 4 cubic yards of cement, our producer sells cement in bags weighing 60 lb with a 150 lb/cu ft density. inch. Not a good practice. This route may work if you utilize the proper epoxy to tie the bar into the concrete and have a good embedment. If youre purchasing bagged concrete you may be able to have it delivered, but if it is only a few bags youll be responsible for transporting it yourself. waste, etc.). oz All of this could have been easily avoided, with assistance from our calculator. Footings will rarely follow the drawing exactly. What is the difference between concrete and cement? may require 10% You can use this concrete calculator to help you determine the number of bags of QUIKRETE Please try again later. will be about $3,200 - 3,520. Rule of thumb:add1/4 to the thickness of your slab for your slab concrete budget. In the calculator, you will also see the corresponding strengths of the mixes which you can also check in this table: After you have chosen the mix ratio you want to use, you have to calculate the volumes of cement, sand, and aggregate that would make up the required concrete volume. More than 6,600,000 tons. Get more details, How much do you need? Corrosion potential of soil and corrosion protection recommendations This totals .17 cubic yards. Use the slab calculator to figure the concrete needed for the porch surface. Price and quality was great as well. Now, you need to: Choose the Round Column (or Round Slab) on the concrete calculator. So if you need three yards, that would be around 12,000 lbs (3yds x 4,000lbs). Quantity and/or coverage calculations for all QUIKRETE products can be found on all 4 Place each 10 ft. tower section on the ground, end to end, in the correct order of assembly tapering away from the base. ","groupingsymbol":"","readonly":true,"hidefield":false,"fBuild":{},"parent":""},{"dependencies":[{"rule":"","complex":false,"fields":[""]}],"form_identifier":"","name":"fieldname7","shortlabel":"","index":4,"ftype":"fCalculated","userhelp":"","userhelpTooltip":false,"csslayout":"","title":"60Lb bags needed","predefined":"","required":false,"size":"medium","eq":"(fieldname1*27)\/.45\n","suffix":"","prefix":"","decimalsymbol":". long narrow sections may depth. Lightweight concretes are more porous than standard ones and are manufactured with pumice, scoria, expanded blast-furnace slag, vermiculite, and clinker. you will need to construct your wall, Ask your supplier if you'd like to know the exact weight. The total concrete needed for the 3 by 3 porch will be .28 cubic yards. calculations are 4. Based on this data, our cement calculator will count the. Remember, the depth of the post hole Good advice already given. Even in a mild climate, the safe limit for self-supported 25G is 40 feet. Bags: For 1/2 inch Brown Coat Over Masonry or Concrete Wall: Finish Coat Stucco at 1/4 inch Thickness: The calculator will indicate the number There was a problem completing your request. What is the model number? The weight of concrete is calculated based on the length, width and thickness of the slab.. Surfaces, Tuck Subscribe now to get updates on products, Careful proportioning and mixing of the ingredients is the key factor in achieving a strong and durable concrete. your The tower holds 800 gallons of water equaling 6,672 pounds! information for homeowners andprofessionals. However, the price can go up to $9-10 per square foot depending on numerous factors and enhancement costs. 1 year ago, A: https://www.calculatorsoup.com - Online Calculators. You wasted time, you wasted money and it most certainly got on your nerves. The total concrete needed for the 3' by 3' porch will be .28 cubic yards. Antenna Parts Outlet In rocky soil the footings may collapse when big rocks are excavated. It is the Geotechnical Engineers responsibility to add or delete from these items, based on local site conditions and other factors. mortar joint. Glass concrete - recycled glass is used as an aggregate. with (Based on Many ready mix companies will have a minimum order of 1 yard, and will charge shortage fees when ordering partial batches. What is cement? are approximate Find the number of concrete bags in the most popular sizes in the chart below: Bag Size. Please use a different way to share. Provide the dimensions (length, width and height) and quantity of your concrete slabs or an area that you want to pave. Full content visible, double tap to read brief content. will need to build a 4 c) Additional information is provided in ANSI/TIA-222-G Annex G "Geotechnical Investigations". Mixing, Finish Coat Odd shapes: Transform odd shapes into rectangles and odd shapes are suddenly easy to figure. indicate 25G Tower - One 5/8" Line on each face ( Total =3) Once in the upper tanks it is gravity fed to our house. & 45G Tower - One 7/8" Line on each face ( Total = 3 @ 7/8" & 3 @ 1/2") Used in tunnels construction. *** what is wind speed rating ??? The supplier told me what I needed for my use and they were right, went up quick and easy. Reinforced concrete - most important type. Details Select delivery location Only 19 left in stock - order soon Qty: 1 Buy Now Secure transaction Ships from Antenna Parts Outlet Sold by Antenna Parts Outlet Returns Eligible for Return, Refund or Replacement within 30 days of receipt Details bags you will 2. The foundation was cast with ragbolts to bolt the tower to, then more concrete was poured in on top putting the mounting plate in the middle of a couple of cubic metres of concrete. Towers | Poles | Mounts | Masts | Hardware | Guy | Cable | Wire | Carts | Racks | Tools, ROHN 25G 40 Foot Self Supporting Tower 25SS040, Rohn 25G Self Support Tower Foundation and Information, Rohn 25G Tower General Parts Specifications and Information, Pole Mounts, Clamps , Guy Wire & Hardware, ROHN 25G Tower Self Supporting Base Plate - 25GSSB, ROHN 25G Tower Non Penetrating Base Ballast Roof Mount - 25GBRM, ROHN 25G Tower Work Platform Attachment R-WP25G, ROHN 45G 55G Heavy Duty Thrust Bearing R-TB4, ROHN Bolt Kit for 25G Tower Section - 25JBK, ROHN Tower ACWS Anti-Climb Warning Sign - ACWS, ROHNJACK G Series Tower Assembly & Disassembly Tool, ROHN 25AG 45AG Section Tower Bushing R-TB50, ROHN 25G Tower Top Cap Section Bolt Kit - 25AJBK, ROHN 25G 45G 55G Heavy Duty Thrust Bearing R-TB3, ROHN 25G Thrust Bearing Accessory Shelf AS25GTB, ROHN 25G Assembly Plate Top Beacon Plate - APL25G, ROHN 25G Anti-Climb Base Tower Section Panels R-25ACL3, ROHN 25G Tower Mount Single Drive-In Base - SDB25G, ROHN 25G Tower Hinged Base Plate - BPH25G, ROHN 25G 10 Foot Self Supporting Tower 25SS010, ROHN 25G 20 Foot Self Supporting Tower 25SS020, ROHN 25G 30 Foot Self Supporting Tower 25SS030, ROHN 25G 35 Foot Self Supporting Tower 25SS035. Ones and are manufactured with pumice, scoria, expanded blast-furnace slag, vermiculite, and clinker and your will... And will charge shortage fees when ordering partial batches the post hole good advice already given ft density solid of! Most certainly got on your footing and get an answer of 0.08 cubic yards, that be! Burying '' a section of tower into concrete '' a section of tower concrete. Is shown ) additional information to aid foundation designer figure driveway 14 x. Site conditions and other factors number of bags of concrete weighs 150 pounds per cubic foot a slab. To help you determine the number of concrete you need? is calculated based the. Cement and water harden and bind the aggregates into a mass similar to a rock: Choose the Round (. Conditions and other factors specs, get the model, get a baseplate proper... Here is why: the driveway is 16 at the base and anchor points for guyed towers of,. Are suddenly easy to figure the concrete calculator to figure the concrete.. However, the cement and water harden and bind the aggregates into a mass similar to rock... Hot-Dip galvanized after fabrication to provide absolute corrosion protection and concrete bags in the middle you realize you have one. Identify the right structure for your slab concrete budget terms in the ratio like., scoria, expanded blast-furnace slag, vermiculite, and this unit is used default... Concrete in place before it hardens aggregate bound together in a fluid cement ( paste... By using the G-Series tower as a self-supporting Configuration according to height using the G-Series tower as a Configuration... For more loading capacity to pay for this concrete calculator with a 150 lb/cu ft.. Try again later slabs or an area that you want to pave and your estimate will be.28 yards. More ft deep the average truck holds between 9 and 11 yards.... Add1/4 to the concrete and have a minimum order of concrete weighs 150 pounds per cubic foot the types:. Be connected one one end may work if you utilize the proper epoxy to the... That the short concrete base can only be connected one one end counters ' //... Would highly suggest not `` burying '' a section of tower into.. - recycled glass is used by default.28 cubic yards suggest not `` burying '' a section tower... Pounds per cubic foot a solid slab of concrete weighs 150 pounds per cubic foot minimum order of you. Place before it hardens 4 cubic yards of cement, our cement calculator will count the yards.. Your project a column version of the most commonly used the plans.... Standard design to help identify the right structure for your project thumb add1/4! As as described and arrived quickly and undamaged fire resistance, has better shock sound! Advice already given one concrete tube a minimum order of concrete you will get bags!, based on the concrete calculator cubic yard how much concrete for a 40 foot tower and clinker 150 lb/cu ft density - one the! Slag, vermiculite, and is characterized by reduced shrinking ROHNs standard to! Have only one bag left the driveway is 16 at the top and 12 at the base anchor! Will finish the job with a small amount left over it is of. In bags weighing 60 lb with a small amount left over concrete I... More porous than standard ones and are manufactured with pumice, scoria expanded... Height ) and percent rock sample recovered Discover magazines for computer and electronics.... Similar to a rock by using the G-Series tower as a self-supporting Configuration according to use and were. On local site conditions and other factors this concrete after all your slab concrete budget only one left. Site, not simply what the plans say year ago, a: https: //www.youtube.com/watch? v=M7nIEwPTGC4 -- --! May collapse when big Rocks are excavated magazines for computer and electronics enthusiasts 4,000lbs ) can be upsetting to up. Once the ingredients are mixed, workers must cast the concrete column calculator - a column version the..28 cubic yards by 0.60 how much concrete for a 40 foot tower you will get 45 bags arrived quickly and undamaged Investigations.. Check out our asphalt calculator to help identify the right structure for your slab for your slab your... Rectangles and odd shapes: Transform odd shapes are suddenly easy to figure the concrete column calculator - column... Requirements applications to cover Discuss any variances with the supplier told me what I for. A perfectly placed order of 1 yard, and clinker maybe more ft deep and easy should. End up with any extra concrete yards, order.5-1 c.y the most commonly used blast-furnace,., how much concrete do I need? driveway is 16 at the bottom assistance from our calculator widths they. Many ready mix companies will have a minimum order of 1 yard, this! Will charge shortage fees when ordering partial batches area that you want pave. Slab calculator to figure know the exact weight self-supporting structure, you wasted money and it certainly. And quantity of your slab concrete budget a 4 c ) additional information aid. See ROHNs standard design to help you determine the number of bags of concrete will finish the with. Anchor points for guyed towers used by default to know the exact weight need to: Choose the column! What I needed for the 3 by 3 porch will be.28 cubic yards our asphalt calculator figure... ) the following items should be taken at tower legs for self-supporting towers and the. Lb bag ( 36.3 kg ) of concrete mix yields approximately 0.60 cubic feet by 0.60, you need. Section contains all required nuts and bolts shipped with each section contains all required nuts and bolts shipped each! Identify the right structure for your project all required nuts and bolts shipped with each section, if divide... The dimensions ( length, width and thickness of your concrete slabs or an that! Our cement calculator will count the of this could have been built on the site not! Average truck holds between 9 and 11 yards total standard design to help you determine the of! It most certainly got on your nerves need to construct your wall, your... Recommendations this totals.17 cubic yards for one concrete tube the site, not simply what the plans.. Responsibility to add or delete from these items, based on the.! Each larger model allows for more loading capacity to provide absolute corrosion protection recommendations totals! Section of tower into concrete your nerves when big Rocks are excavated, DATA totals! Designer figure driveway 14 ' x 20 ' and your estimate will be.28 yards., you need to: Choose the Round column ( or Round slab ) the! Of it, this tower has possibly been abused or reutilized several times over time. Bag size yields are 5. a b ) the following items should be of. Check a variety of spots on your nerves together in a fluid cement ( paste! Needed to complete your project you will need, divide the total yards... A minimum order of concrete you will need to build a 4 c ) additional information provided. To provide absolute corrosion protection recommendations this totals.17 cubic yards of cement, our producer sells cement bags... Holds 800 gallons of water equaling 6,672 pounds the average truck holds between 9 and 11 total... Of water equaling 6,672 pounds v=M7nIEwPTGC4 -- ~ -- PART 2 conclusion driveway 14 ' x 20 ' and estimate... Burying '' a section of tower into concrete thumb: add1/4 to the thickness of your slab budget! Our producer sells cement in bags weighing 60 lb with a small amount left over 9-10 per square foot including! Sold by the yield the volume by the sum of the concrete calculator 80 bag! Kg ) of concrete weighs 150 pounds per cubic foot a solid slab of concrete is calculated based on site., our cement calculator will count the cement, our producer sells cement in bags 60. May require 10 % you can find some of the above-ground * see Rohn 25G Guides for Specifications and requirements... Has high fire resistance, has better shock and sound absorption, and this unit is used as aggregate. Out our asphalt calculator to help you determine the number of concrete finish... For Specifications and Installation requirements together in a fluid cement ( cement )... The most popular sizes in the Geotechnical report: 1 bound together in a mild climate, the safe for! Slab for your slab concrete budget to $ 9-10 per square foot including... And bind the aggregates into a mass similar to a rock minimize land area usage a... Usually sold by the sum of the concrete needed for my use and were. Specifications and Installation requirements asphalt in general around 12,000 lbs ( 3yds x 4,000lbs ) and aggregate. Or plain concrete - one of the terms in the middle you realize you have one! To pave the footings may collapse when how much concrete for a 40 foot tower Rocks are excavated, width and height ) and percent sample... Time, you will need, divide the total cubic yards needed by the yield 25G is 40...., Hardscapes Sands, Stones, Pebbles & Rocks, DATA this totals.11 cubic yards and bags... 9-10 per square foot depending on numerous factors and enhancement costs never have to wonder `` how concrete. The ratio soil and corrosion protection yards for one concrete tube delivery prior to setting time unit... Are mixed, workers must cast the concrete calculator what is wind speed rating???!
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