How many feet before an expansion joint is installed in concrete sidewalk?
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Answer . It depends on the size of the sections, but generally, no less than 4 inches.
Bridges are subjected to incredible forces of wind heat and cold. They need to expand and contract to prevent them cracking or buckling. Expansion joints are devices that are …used to allow for the heat-induced expansion and reduction that takes place in various states of weather. The expansion joint is often used in the construction of bridges and sidewalks. They are used by an Interlocking metal device that allows the teeth in the joint to move in response to changes in temperature and humidity levels. Expansion joints are usually placed at strategic points in the construction, making it possible for the sections to expand and contract slightly without weakening the overall structure.. Along with use in sections of sidewalks and bridges, expansion joints also are used with railway tracks. As with bridges, the joints are placed at key locations along the tracks and allow the metal tracks to undergo contraction and expansion as the weather changes. The end result is that the tracks remain intact and aligned properly. Using expansion joints for railway tracks helps to minimize the expense of maintenance of railways, allowing railroads to focus on other areas of operation.
Concrete expands as it gets warmer and contracts as it gets colder. Left to itself these size changes can lead to cracks occurring, if different parts of the structure heats u…p/cools off at a different rate than other parts. By dividing the concrete into sections separated by joints that allow for some movement the thermal stresses can be managed and the risk of the concrete cracking goes away.
If a sidewalk at your house measures 48 wide 4-inches thick and is 40-feet long how many cubic feet of concrete are in the sidewalk?
53 and 1/3 cubic feet, concrete is normally sold buy the cubic yard, this would be 1.975 cubic yards. Figure on 2.25 CU yards to be safe. You do not want to run short when pou…ring concrete.
Concrete pavement always develops cracks. Unless expensiveadditives are included, the pavement block will shrink slightlyduring curing - and soon crack. Pavement expands when …heated andcontracts as it cools so, even when reinforced with steel mesh, asufficiently long block of pavement will eventually contract enoughto crack, or expand enough to buckle (explode up). The solution is to intentionally make cracks exactly whereintended, at expansion and contraction joints, and design them notto leak, nor shear vertically, nor fill up with grit. There are far more contraction joints than expansion joints inhighway pavement. The expansion joints are made with a gap all theway through the concrete. The contraction joint has no gap atfirst, but is designed with a deep slot and shallow groove toinvite a crack. With proper construction techniques and frequentcontraction joints, the pavement will not develop troublesome straycracks. Both types of joints are reinforced with a sturdy set of parallelsteel rods spanning the joint. The pavement blocks are kept inalignment with the rods, yet can slide along them. The rods arecoated with epoxy for rust-proofing. The epoxy is coated with anoil-soap film so the rods can slide in the concrete. Every joint is sealed closed just below the surface with an elasticglue, or springy structure. The seals job is to keep out water,road salt, and grit.
If a sidewalk is 110 feet long by 4 feet wide and 4 inches deep how many cubic feet of concrete will be required for the driveway?
147 cubic feet of cement are required.
Hot weather causes the metal the bridges are made of to heat up and expand. If there was no space for them to expand then the bridge would either crack it's foundations or tea…r itself to pieces.
No, it's okay to leave on.
Usually after. Install the basic or minimum components first: motherboard, CPU, RAM, hard-drive and optical drive. If the motherboard does not have built-in graphics (most do …these days) install a graphics card. Plug in the monitor, keyboard and mouse. Unplug all other USB/FireWire devices. Start the system and set the BIOS/CMOS settings accordingly. Then install the OS. With the OS installed, install the motherboard drivers (chipset, RAID, audio, ethernet, etc). Then install the expansion cards one at a time. Test each new component before moving to the next. Finally, install printer drivers and any other removable hardware (USB/FireWire devices). With the hardware sorted, you can begin installing software programs.
Expansion joints allow the concrete to expand and contract with temperature changes which prevents it from cracking.
In heat the sidewalks contract as when the winter comes the coolness cause's the sidewalks to contrast.
A new sidewalk will be 4 feet wide 200 feet long and filled to a depth of 6 inches with concrete. how many cubic yards of concrete are needed?
Approximately 15 cubic yards of concrete are needed for the new sidewalk. Volume of concrete needed = 4 feet x 200 feet x .5 feet = 400 cubic feet 400 cubic feet = 400/27 cubi…c yards = 14.82 cubic yards
How many yards of concrete do you need for sidewalk that is 4 inches deep by 4 feet wide by 100 feet long?
Five. 100 feet times 4 feet times 1/3 foot (4") is 100*4/3=133.33...cubic feet I believe a "yard of concrete" is a cubic yard and so = 3 3 = 27 cubic feet 133.33 / 27 = almo…st 5 (4.9382716...)
Expansion joint's specification depends structure to structure. It depends upon its use rather the purpose it is for. Material used for expansion joint is Neoprene sheet of 5…0mm thick. Basically material should porous & medium density. Eg. While connecting two different super structure viz. column, we can keep the sheet between the reinforcement of two columns tieing the sheet with binding wire & r/f. Debdutta