How to groove concrete. This groove is to help control cracking.

How to groove concrete This reduces hydroplaning and increases friction. 06-85 is the primary document that governs the features of creating grooves in a concrete wall using any type of tool. Before you get started. Dividing slabs with grooves looks nice, but the real reason is to control cracking. Dec 30, 2022 · 4. Mar 17, 2011 · Step 1. In hot weather, concrete might crack if joints are not cut within 6-12 hours after finishing concrete. However, it is important to use an appropriate underlayment to prevent moisture buildup between the concrete and the flooring. Ideal for Milking parlours, Livestock Apr 13, 2024 · Concrete groove grinding also helps extend the lifespan of concrete surfaces. egger. WHEN TO CUT CONTROL JOINTS. Dylan and Neil describe how to build a tongue and grove cedar wall. Filmed 2020 Wisconsin on a small organic family d Groove cutting for concrete expansion and arresting the cracking of concrete surface Dec 23, 2022 · In this episode of Jobsite Conditions, Jeff Hershberger shows you how to apply vertical concrete to any surface! Check out our hands-on classes for more trai Tongue and Groove floor boards can be fitted down in few ways:1. Follow our how-to guide for all the tips and tricks to ensure a flawless installation. SNiP 3. Alright! Concrete countertops are awesome, and in this video I show how to build a highly custom countertop by creating a unique mold. e. Remember, cutting concrete can be messy work, so be prepared to deal with lots of dust and debris. We would like to groove the pavement longitudinally but the state allows only transverse grooving. Diamond Blades. Mortar, used to build brick and concrete-block walls, is made of portland cement, lime, and sand. Give your cows a flooring they can trust. We are now required to groove it transversely. to/2ud3fNT routing some grooves for the built in upper bookcases. If an overlay or coating needs to be applied, then the texture usually has to go. Feb 4, 2019 · #pooldeckfinishes #grooveconcrete #broomfinishconcreteCONCRETE FINISHING TECHNIQUES:In this video I'm showing you one of the many concrete pool deck finishes http://www. The grooves are difficult to get deep if the concrete is too dry. Measure your walls, then cut the length of 1-by-3-inch furring strips to fit using a circular saw. Nov 21, 2019 · The tongue and groove locking system are deceptively simple. A better method of getting maximum deck drainage is to saw grooves into the pavement transversely, or perpendicular to the direction of traffic, after concrete has cured. Let us know what tools you would like to see us cover in the future. To make your own concrete mix, use 3 parts sand, 2 parts gravel, and 1 part Portland cement. After the tubing was installed then a morter mix was used to cover the tubing and then leveled to the top of the nailer boards. This is a job for an angle grinder with a suitable disk. Learn what tools are used an Apr 22, 2024 · Some common tools include circular saws, concrete grooves, and diamond blades. Cut Grooves. Then have Midwest Grooving come and groove it to your specs, this way the grooves will have the nice clean 90-degree angle instead of the rounded edges left by floated grooves or cobblestone stamping. com Concrete groover video. There are two ways to go about this. N20/10) you must call in the professionals and have the concrete delivered via a truck - its the only way to ensure a specified final strength of concrete. Concrete strength is decreased by 500 psi for every How to make a groove in a concrete wall. Strength and Rebar – Most concrete in feedlots should be 4,000 psi, 6 inches deep and have ½ inch rebar every 4 feet when the project is finished. The blade is designed to cut through the concrete with ease. #concrete #homemade #diy A constant check shall be maintained on the geometry of the grooves. Jul 8, 2010 · http://www. Other than cutting all the way thru the slab and removing giant lines of concrete, then refilling it to desired depth, is there an easier way to do this? I want 3-4” grooves between pavers for that fake turf grass. Materials and Tools You will need the following materials and tools: Tongue and groove flooring planks Vapor barrier Underlayment Moldings… Read More » Concrete grooving is the process of creating patterned grooves along concrete surfaces. Resist the urge to force it into place. Is there a way to cut a 2-3cm or so groove to make the water flow away from the house? I don't want to cut all the way through as they put plumbing in the concrete. to/373RyWQEdge Guide:https://amzn. (you let the hammer drill do the work or you will go through tons of bits. Using a homemade tool to groove the concrete for cows to get to the barn without slipping. Make sure to keep the blade steady and to apply even pressure. This will act as a moisture barrier. In newly laid concrete, you can use a hand groover to press a line from one side of the slab to the other about one inch into the Oct 21, 2024 · Concrete is composed of Portland cement, sand, and aggregate. How to form a driveway and concrete curb mote strip! In this video we go over all of the demo and forming of this job. Concrete highways form a vital part of infrastructure across the globe. -deep groove along each side of the crack. Concrete These grooves serve various purposes, such as making the texture lines in concrete to prevent slipping, controlling shrinkage cracks, and improving the aesthetics of the concrete surface. Create a groove in the new mortar with a round-nosed trowel. Then, gradually deepen the groove by making several passes over the same area. Concrete consistency is essential to make good grooves. The OP would need a hole big enough to get the elbow through too, using duct tape to keep the dirt out or use rigid irrigation line with out the sleeve, then go with flex line to the faucet. You can choose from various wood types, such as pine, oak, or walnut, providing excellent natural insulation and warmth. 7. The longest and most visible wall is usually the best place to start laying the planks, which require a 1/2-inch gap around the wall. Tips for Success : Floating floors are more forgiving of minor imperfections in the concrete but still require a flat surface. Adding grooves designed to optimise cow comfort, traction and welfare to new concrete. Snake a wire from electrical box to the ceiling, then lay wire in the groove and spackle it over. Step 5: Nail Down the First Perimeter Board. For this reason, if the movement is restrained, concrete will crack, randomly. Using a diamond blade on your circular saw, cut a 1/2-in. Rainwater falls on old slab A at the top, which is nicely V'd so water collects in the middle (you can see the mud collecting t Jul 22, 2023 · I don't want the cows to slip on the barn floor so we used the Roll-a- Groove tool to make a pattern that should help prevent that. I always tell my students that no concrete, anywhere in the world, is the same from batch to batch. If you’re planning on finishing a basement or portion of your home that has a concrete floor then it may be a good idea to insulate it before installing basement flooring. Dec 19, 2023 · Can you put tongue and groove over concrete? Yes, it is possible to install tongue and groove flooring over a concrete surface. For example, if you are building a ramp for a garden shed, you’ll want to put a layer of tar paper on the front of the shed’s structure, where the In this video we will show how to fill a crack, expansion joint, break joint or divots in an inside concrete floor using SealGreen Patch Repair Material. Grooving concrete made easy. I'm just showing how I did this job. Apr 20, 2022 · Wall chaser is used when it is necessary to cut grooves in concrete, stone or brick for laying wires or pipes. These include purpose-built concrete saws, circular saws, and masonry saws. Wear an N-95 respirator and turn on a fan to blow the concrete dust out of the garage. Not cheap bits! 2) Use only 3/4" hardwood. However, it is important to ensure that the surface is clean and dry before installation to prevent any issues with adhesion. Oct 16, 2024 · Use the 2x4 to level the concrete. May 29, 2020 · The concrete mix is probably one of the most misunderstood aspects of stamping, especially for newcomers to the process. IntegraFlex 1921 is 100% solids, two component polymer hybrid resilient filler for expansion joints and cracks in concrete or masonry. Attach the furring strips to your concrete wall using a hammer drill and 2-inch bolts. Materials Required * Tongue and groove pine… Read More » Slippery or abrasive concrete is detrimental to hoof health. However, if you still don’t feel comfortable cutting concrete with an angle grinder, you do have an assortment of other options. Aug 6, 2018 · It’s usually done with a concrete saw shortly after the concrete is placed and finished, and the typical depth is three-quarters to one inch—just enough to weaken the slab slightly at the score so that any cracks happen at the bottom of the score line, where they are not noticeable. Watch and Learn How to Install the Best Chan Nov 16, 2012 · A concrete floor is designed to be sturdy and strong and take a lot of abuse. Basically, as concrete cures, it exhibits volumetric changes mainly due to shrinkage, temperature, and moisture. What is Spalling of Concrete – causes and repair; 20 Factors Affecting Durability of Concrete; Durability of Concrete [Requirements and Problems] Vibration of Concrete [methods and correct procedure] 6 Factors Affecting Curing Time of Concrete; 11 Methods for Curing of Concrete; A Detailed Study on Concrete[from scratch] Mar 23, 2017 · The rule for partial earth lots is that runoff water flows onto concrete, never off the concrete into the lot because of excess erosion and mud. Unlike asphalt, concrete offers longevity and performance. May 5, 2010 · The groove on the perimeter board will also serve to anchor one or more ratchet clamps, to push the tongue and groove boards together snugly. If you don’t place it at just the right angle, it won’t snap into place. & Nate The Great show you how to install a tongue and groove wall above a stair case like a pro. CONCRETE:1) secure 3/4" plywood to the concrete using 2-1/4" Tapcon concrete locking screws. Roller for creating non slip concrete surface. Dec 12, 2020 · Re: How to cut grooves in concrete sidewalk In alt. How to Make Groove on Concrete Wall----You can also watch: https://www. A vacuum cleaner is also necessary for grooving concrete. Drying and soil movement cause concrete to crack. Fill the groove with a good quality concrete caulk and slide a piece of vinyl flashing into the groove. Here is a quick video on how to use a vertical groover or a piece of rebar to create a vertical groove in new concrete. Use a sawing motion to pull and push the 2x4 across the concrete as you move it down the length of the forms. C. Feb 9, 2009 · The space between the nailer strips the tubing was place and attached to the concrete floor. In todays video we show you how to fix drainage issues on a concrete slab. This requires drilling each with a titanium drill bit. Do I Need Special Tools for Installing Tongue and Groove Walls? Dec 5, 2018 · Before pouring the concrete, put in a layer of roofing felt or tar paper on any permanent wood structures with which the concrete will come into contact. This is used to Jointing the concrete is accomplished by grooving tools (unless the slab will be sawcut later). Feb 4, 2020 · I want to create look of giant poured in place pavers on my driveway, using the existing concrete slab. You Mar 1, 1985 · However, we got caught by rain, which washed away the existing texture and prevented further tining. What: Groovers come in many different shapes and sizes, but they all work to control joints or grooves in concrete (controlling where the cracks form). Then use it to smear the old surface. Using the technique described below, move the 2x4 down the forms to remove excess concrete. The concrete slopes slightly toward the house causing water to drain-off underneath. How about the reverse? Fix a 6 mm square length of sacrificial hardwood where the groove would go? Same effect, change every few years as needed. Concrete crack repair sealants are made of several materials, including silicones, epoxies, polysulfides, and asphaltic materials. Jun 14, 2023 · Sidewalks and small slabs need grooves about every 4 ft. For Oct 5, 2018 · Stamping or moulding concrete cement walkway Jan 7, 2021 · Making Groove Design on a Wall#Wall #Groove #Design Yes, it is important to use waterproof glue for outdoor tongue and groove projects to prevent the glue from breaking down due to exposure to moisture. May 16, 2012 · Paint a waterproofing concrete sealer over your walls with a paint roller or paint sprayer. Studies show that concrete pavements can last 20 to 40 years without major repairs [source: Federal Highway Administration]. 9 - Install the piece by inserting the tongue into the locking groove while the other end is held up, then placing it in position using the pull bar. Step 5 - Installing the Floating Floor Here is a link to Egger for more information on the flooringhttps://www. home. Cracks will form within the groove line, leaving the surface of the slab unblemished for years. Jul 16, 2021 · Remove rainwater FAST - CUT & Chip out a concrete channel drain any depth you want to help control rainwater downpours . Can tongue and groove flooring be installed over concrete subfloors? Yes, tongue and groove flooring can be installed over concrete subfloors, but a moisture barrier and adhesive designed for concrete must be used. 10 Methods How to Cut a Groove in Concrete 1. Chip out the cracked portion with a maul and cold chisel. This creates channels for the new concrete to enter and interlock with to facilitate sticking together. Nov 3, 2023 · Apply sealant generously to the groove and allow it to cure. 6. We share what tools to use and what mistakes to avoid. Using either 1-inch finishing nails or the pneumatic nailer with staples, attach the first perimeter tongue and groove board to the furring strips. In this guide, we will cover the essential steps to a successful pine flooring installation on concrete. Additionally, it is possible to re-groove old concrete floors as required for enhancing traction. If you live in a cold climate then you’re no stranger to cold concrete floors in the winter. concretenetwork. Sep 7, 2023 · Are you looking for an upgrade to your concrete basement floor that is easier to install and more aesthetically pleasing than basic tile? Tongue and groove flooring may be the answer. Don't operate this kind of mach Learn how to add a beautiful and functional statement wall using easy-to-install tongue and groove panelling, courtesy of Alex Lawson (otherwise known as @ca Nov 28, 2019 · Bosch router:https://amzn. The CowPlan healthyfeet concrete groover is perfect for cow passages. Learn why groovers are used to place control joints in fresh concrete. https://aectearthblock. Concrete is not a generic product that is the same from pour to pour. Make sure you are cutting joints soon enough. Construction number 091 is a very convenient tool for the constructive industry! Click HERE to subscribe to Make it Extreme: http://bit. By repairing cracks and grinding down uneven areas, the surface is protected from further damage and deterioration. Using an angle grinder and drill to cut grooves for running electrical wires on a CEB home. All you need is a rigid tray, a hoe and a few hand tools. How It Works: The hardwood planks click together via a tongue-and-groove mechanism or are glued along the edges, creating a “floating” layer that isn’t attached to the concrete. Finishing is There should be proper groove depth, spacing, and width. The task of cutting grooves can be performed for concrete floors after the floor's initial curing completes. This countertop has an Nov 6, 2024 · How to design a groove in concrete #malikarif #archdesign #construction Grooving increases skid resistance by creating parallel channels in the concrete surface through which water, oil, chemicals, and other substances can drain. Allow the sealer to dry at least 24 hours. This is particularly crucial in basements, which are more susceptible to leaks. Durable and robust, these roads often see heavy traffic. Introduction: What is a concrete groove cutter? A concrete groove cutter is a powerful tool used in construction and renovation projects to create precise and clean grooves in concrete surfaces. Install the fixture (I have not decided on exact type yet, probably something hanging like a chandalier) with concrete bolts. However, inserting the tongue into the groove may seem a bit difficult at first. Nov 2, 2020 · Concrete is by no means a homogenous thing, and the catastrophic results of encountering a particularly hard pebble along the path of the groove don't bear thinking about. This then allowed a wood floor to be nailed down over the concrete into the nailer's strips. Jul 1, 2021 · In other words, if the concrete does crack-you want to have an active role in deciding where it will crack and that it will crack in a straight line instead of randomly. The keyway may be formed by fastening metal, wood, or pre-molded key material to a wood bulkhead. This groove is to help control cracking. For larger projects or industrial settings, specialized equipment such as scarifiers or grinding machines may be used. Grooving is usually performed on bridge decks, airport runways, parking desks, and other paved surfaces in order to accommodate high-speed traffic. The width and spacing of the grooves are important to ensure that the grooves perform their intended function. Mortar Mix. com/shop/en_GB/building/product-detail/PROTECTHere is a link to the Egger Joint The previous owners poured concrete at the back of my house, probably in the 60's. Groove the concrete every 4 to 6 feet in width. follow the progress on Instagram Nov 19, 2024 · Understanding Concrete Highways. 3. How wide should the expansion gap be? Oct 3, 2022 · Groove cutting is the technique to provide control joints in concrete to guide crack along a predetermined line and to help accommodate the movement of the c Here is a quick video on how to use a vertical groover or a piece of rebar to create a vertical groove in new concrete. 05. Can I glue tongue and groove boards to concrete? Yes, it is possible to glue tongue and groove boards to concrete using a strong adhesive that is designed for this purpose. com/#compressedearthblock #advancedearthenc Cut a shallow groove in the ceiling to the nearest wall with electrical box nearby. In this video I share a tip I utilized in a recent concrete patio build project to better ensure my concrete control joints would work as designed. Aug 1, 2021 · Small surface water drainage design fail has come up that neither architect, SE, groundworker, or myself spotted before the slabs were laid, and now needs remedial work. A. Sep 22, 2015 · Kudos to that, I could not think of the items that would do the trick that the OP could get to go about the way you described. Glued down to whatever is underneath concret Feb 15, 2022 · Cutting the concrete for 5" wide Channel Drain Requires a Good GAS POWERED SAW and a couple things to remember. The C. The depth of the groove is also necessary for the functional performance of the grooves and, in addition, it determines the usable life of the grooved surface. In this manner the IntegraFlex bonds with both vertical surfaces but remains free from the bottom horizontal surface so when the concrete moves the chances of the flexible IntegraFlex shearing are greatly reduced. Add grooves every 10 or 12 ft. Mo The Oregon State Marine Board, in partnership with Cal Boating, are sharing this video to help contractors properly apply a v-groove tool for maximum tractio May 5, 2023 · Sanding in grooves can be difficult, but it can be a breeze with the right tips and tricks. on driveways and garage slabs. For more home improvement tips visit https://ww May 1, 2023 · Cut a Groove on Both Sides of the Cracked Concrete Cut a Chiseling Groove. Making a scratch coat: Mix a small amount of the repair product with water to a soupy consistency. In this There are lots of ways to pour concrete, and today I'm showing you the simplest approach I know of. Remove the concrete with a sledgehammer and a shovel. 5" overhang when I install forms for a concrete On this week's Technique of the Week, Jason shows you how to Roll a Concrete Border Groove!Thanks for watching Technique of the Week! If you want more of the Jul 26, 2024 · STEP 10: Groove the concrete to create control joints. repair, on Sat, 12 Dec 2020 18:01:02 +0000, Goalfooter wrote: I Cracks in concrete sidewalk Aug 1, 2023 · Groove Filling procedure of Flooring work Groove cutting is the technique to provide control joints in concrete to guide crack along a predetermined line and Jun 21, 2024 · Grooving: Use a concrete saw to groove the existing concrete surface. This process helps to prevent water penetration, freeze-thaw damage, and other environmental factors that can weaken the concrete over time. com/watch?v=5gjPoXb9jYISLAB ON GROUND Paano magbuhos ng slab sa Ground Floor Sep 13, 2009 · cut the groove as close to the wall as you can, about 1" deep, and angle it slightly further away from the wall at the end you want the water to flow. Mar 15, 2024 · How to Install Pine Flooring on Concrete Slab Installing pine flooring on a concrete slab is a relatively straightforward process that can be completed by a DIY enthusiast with the right tools and materials. This requires closing two lanes, is a danger to the public, and is very slow. Lucky for us, we don't have to mix it the old way anymore, where we used to have to mix the sand and the cement together #EXTERIORDESIGN #GROVEDESIGN #DIY Sep 22, 2023 · Once you’re ready to cut, start by making a shallow groove in the concrete along your marked line. Mar 31, 2017 · Cutting grooves in hardened concrete eliminates the need for contractor experience to groove wet concrete and time-sensitive completion. 2. This video shares how to safely grind concrete floors. It’s ideal for projects like walkways, slabs, and foundations. #concretemachinery #diy #toolreviewsDisclaimer: This is for entertainment purposes only. We try two different techniques in this video. Feb 18, 2024 · Choosing vinyl plank flooring for your concrete base combines the best of both worlds: the practicality and sleek look of vinyl with the stability of concrete. Diamond blades are one of the most popular methods for cutting a groove in concrete. This guide is your go-to resource for navigating the unique challenges of installing vinyl on concrete, from ensuring the surface is perfectly prepped to laying each plank for a flawless Jun 18, 2024 · Yes, tongue and groove walls can be installed on almost any type of wall surface, including drywall, plaster, or even concrete. This handheld tool is used to cut grooves into the concrete. We first tried putting multiple saw Nov 29, 2020 · Concrete is grooved in dairy barns so that the cows don't slip and so that the skid steer can have traction. The CowPlan Floor Groover, has been developed and test Sep 12, 2023 · Installing tongue and groove flooring on concrete is a great way to create a beautiful, warm, long-lasting floor. Here's a comprehensive guide on how to install tongue and groove flooring on concrete. Concrete slabs-on-grade for use as barn alleys can be placed, screeded, floated and troweled to provide satisfactory results by readily available concrete finishing crews. While these advantages make it great for a garage, basement or subfloor, making major remodeling changes, such as installing a new bathroom over a concrete floor, can be a challenge. I'd not want to drill it- might end up with a chunk of cill on the flor. This will let it expand and contract with temperature changes, preventing surface cracks. Average costs: Expect to pay $35 to $50 for a 3-foot fresno (without bracket). 2. The grooves fill in if the concrete is too wet. May 25, 2020 · How do you cut grooves in concrete? How to Cut Drain Grooves in Concrete. com Check out our websight!! Concrete Construction tool makes cutting joints in green, decorative concrete super easy. These grooves serve several purposes, including enhancing the aesthetics of the concrete, providing better traction, and preventing cracks and damage caused by expansion and contraction. We recommend having the new concrete poured and put a light broom finish on it. Measure to the left and to the right of the chalk line 2 inches and snap two additional chalk lines. Use the Calculator to estimate how many 20kg bags you will need; Read the Hints & Tips section; If there is a specified concrete strength required for your project (i. An easy an effective way to groove concrete. The grooving machine makes use of multi-pointed flails, TCT cutters, or diamond blades to rotate and groove light lines on the concrete surface. Snap a chalk line over the concrete where you want the center of the drainage groove. walkingjointer. Mar 8, 2013 · Like the subflooring, heart pine flooring planks come with tongue-and-groove edges for a snug fit. A concrete groover is the most important tool when grooving concrete. Jun 5, 2023 · When such a blade is used, you’ll find this tool to be fairly easy to control, both as you start and finish your concrete cut. The groove creates a weakened spot for the crack to form where it won’t be seen. If your set on Pine use a yellow pine they're harder. It features a long handle and a blade that is made of either diamond or steel. Use on any concrete patios or drive Aug 23, 2006 · According to one company’s recommendation, grooves should be cut after 14 days of curing. The groove thus formed is filled and sealed with suitable material. Mix new mortar in a wheelbarrow and pour concrete into the trench you cut. Yes, we can, and we recommend cut in grooves for new concrete. #concretefinishing #broomfinish #magfloat #edge #grooveIn this video I'm showing you some concrete finishing techniques we used to give this patio slab a bro Dec 25, 2020 · #EverythingAboutConcrete #MikeDayConcrete #ConcreteFormingIn this video I'm going to show you how I form a 1. It contains no Mixing concrete is not an easy task. from the fine details of nails size, glue, techni If you want to cut shallow safety grooves in flatwork surfaces, some tool manufacturers offer fresnos with evenly spaced V-shaped blades that cut shallow grooves 1/4-inch deep. pinned down into the wooden floor underneath. This video will discuss how to sand in grooves and give you some May 1, 2023 · Transform your concrete floors by installing tongue and groove hardwood. We hope you all enjoy and learn from t Dec 9, 2019 · Concrete groove depths, broom texture and appearance will vary depending on batch variations between truckloads of concrete and different and changing weather conditions, including wind, sun . You merely pop the tongue edge into the groove, and it sturdily locks into place. May 3, 2020 · Cutting a groove in concrete upside down won't be easy. ly/MakeitExtreme Se Sep 5, 2017 · In this video we go over the Walking Jointer and the Hand Jointer concrete trowels. Jan 23, 2025 · Construction joints are cuts along the stamped concrete that allow the concrete to shift and settle without throwing off the lovely pattern you just spend so much time adding. Dec 24, 2009 · Insulating Concrete Floors. youtube. The purpose is to control the location of cracks that may form when the slab "contracts" due to drying shrinkage or temperature changes. Apr 30, 2022 · A contraction/control joint, or saw cut, is a type of concrete joints which serves to control the location of cracks and relieve stresses. Pour one half of a standard mixing truck or 4 to 6 yards at a time, maximum. If t Sep 24, 2023 · Laying Tongue and Groove Flooring on Concrete Tongue and groove flooring, with its interlocking planks, is an elegant and durable option for any home. this will make a 1/8" groove. Family Handyman. Concrete is cut through to the specified depth Routing and sealing of cracks in concrete can be used for dormant cracks not involving the restoration of tensile strength. + (406) 642-7120 May 20, 2021 · The most common mistake is pouring too much concrete at one time. Although it may cost more, cutting grooves provides the following benefits: •The concrete contractor can concentrate on placing, screeding and floating the concrete with the proper grade and putting on a smooth or light broom finish. Sep 1, 1991 · Although this method can produce grooves deep enough for a high-friction surface, the grooves are nonuniform and limited in depth. May 31, 2023 · Broom finished concrete is great for a slip resistant exterior slab finish. In this method the crack is enlarged along its exposed face to form a V-shaped groove up to a minimum width of 6 mm and a depth of 6 to 25 mm. Grooves are cut in hardened concrete slabs using diamond-tipped saw blades lined up on a rotating shaft. Tongue and Groove Construction Joint Tongue and groove type of construction joint is usually given in slabs.