Anchor bolts are used to connect steel components and concrete components, that is, for suspension, and are fixed on the ground usually in the pouring foundation The main lifting function of adjusting the shim is [that is, raising]. After leveling, grouting will fix the equipment on the equipment foundation; Anchor bolts—expansion anchor anchor bolts are used to fix some of the simple equipment or auxiliary equipment that is static.
The fixing method of the foundation is mainly to use the anchor bolts to fix the connection. The anchor bolts mainly bear downward pressure [ie flattening].
Align and level the equipment with the adjustment horn. Yuyao Xintai Hardware Co. We are near to Hang Zhou Bay, and cover square meters. In addition, you need to fix them properly nearby, otherwise they will damage the wall. To install the anchor bolts, first drill some holes where you want to insert the bolts.
Before putting the bolts into the holes, make sure to dust the holes. You can hit the bolt with a hammer until it enters the hole, and then tighten it. The anchor bolts will keep the column in place and stabilize it to prevent swelling due to wind or earthquakes. Common bolt types include:. Drilling bolts: used after the concrete has solidified. Their application is not very common. Cast-in-place bolts: Cast-in-place bolts are used for wet concrete.
They can be bolts or hook rods. Hook rod is a kind of anchor bolt, used for axially loaded substrate. Cast-in-place bolts are the strongest, but they may be difficult to use.
Common applications include heavy machines that are installed on concrete and connect the foundation to the walls of buildings.
There is no standard definition for the term "foundation bolt". The bolts fixed to the basic steel structure are usually called "foundation bolts". However, these types of bolts have been shown to be problematic under high uplift loading, as might occur during a strong windstorm. Portland, Ore. Additionally, the bent and headed types are more common in lower steel grades, whereas high-strength material is more commonlymanufactured as thread each end rods.
Anchor bolts pulled out of concrete. Bolt installation is optimized in the preplanning stage to help determine foundation design. Quarture advises a thorough analysis of the building type, geographic location to determine weather conditions and soils and geotech surveys to determine the possible existence of rock formations. This prevents cold and frost in the ground from heaving—swelling the ground under the concrete and causing issues with the concrete and the building itself.
The design of larger buildings may require additional footing attachments implementing the use of caissons. These are usually drilled and poured prior to the excavation, so that the drill rig can access the exact location of the caisson. Once the caissons and excavation are complete along with the layout, the forming of the footer and piers is done. The concrete is then poured, allowed to set and cure. The concrete is usually required to cure at least seven days but the breaks of the samples from the concrete pours sometime show the concrete has cured to its design strength.
To ensure proper fit use a template that has the same bolt pattern than the bottom plates of the steel structure. Check the location of the bolt group before fixing it to foundation formworks, after the templates have been fixed, and right after the concrete is cast.
Things get much more complicated if concrete is hardened before displacement of the bolt group is noticed. The template can be made either of steel plate or plywood. Peikko uses a 4-mm steel plate which is plasma cut, and equipped with nailing holes as well as location marks.
Because accuracy is so important with foundation bolt installation, a registered land surveyor should be retained to either supervise bolt placement or to actually place the anchor bolts. Newman says an AISC Code of Standard Practice requires that a field survey of as installed anchor-bolt locations be performed before the steel is delivered.
Leaving this work to laborers often results in misalignment and expensive remedial work. Peikko USA sources stress to ensure accuracy and the correct bolt pattern, use the template. If a contractor is using two-by- fours as a template, and nailing the bolts to approximate positions, then walking over the bolts during casting, problems will occur for sure.
Newman cautions that while a properly made template will ensure the proper position of the anchors in relation to one another, the entire group of anchor bolts could still be placed incorrectly.
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