Can expansion bolts be used for connecting factory building column feet?
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I would like to ask everyone: since no bolts were pre-installed during the foundation pouring, is it possible to use expansion bolts to drive them into the foundation in order to connect the column feet of the building?
It seems that the column footings of large factories shouldn’t be done in this way; however, it’s fine for the foundations of smaller equipment
I have done this before: using 20-mm expansion tubes to make a few extra pieces, driving them in, leveling them, and then welding the column feet before pouring grout. I don’t know how big your columns are? What is the seismic fortification standard in your area? What is the service life and function of the factory building?
Yes, use the method from floor 3, and then protect it with cement once it’s completed.
No more holes should be drilled after the column foot has been poured, as this will affect the intended strength of the design. If necessary, the following methods can be used to maintain the original design strength of the column foot. 1-Select a chemical adhesive bolt of the appropriate diameter. 2-Drill a hole of the right length and diameter, use a straw to remove dust from the hole, insert the chemical agent, and then screw in the bolt. 3- Use cement and epoxy resin to create a cast. 4- Curing. Sorry, I’m kind of showing off my skills here
Expansion bolts can only be used for fixing lightweight structures or equipment; for fixing columns in factory buildings, embedded foot bolts or foot bolts cast in place using pre-existing holes should be used. Anchoring the bolts with an adhesive is also a viable option if installation is to be done on an existing concrete foundation.
It is recommended to use chemical bolts; when using expansion bolts, the design conditions applicable should be considered
We have used chemical rebar planting, and the results have been excellent. The requirements for chemical bonding and the specific specifications for chemical rebar anchoring should be referred to.
Personally, I think it’s best to hire a specialized professional company to carry out rebar planting – this yields excellent results and ensures quality. I’ve used this method to solve major problems before. The method of driving in expansion screws is not appropriate; the quality resulting from this approach cannot be guaranteed. :loveliness:
Recommendation 1: Use a professional reinforcement company for rebar planting. 2: Chemical bolts can also be used (selectable based on pull-out resistance requirements)
Expansion bolts cannot be used to drive into the foundation to connect the column feet of the building! ! ! The column footings in factory buildings must use different types of connections depending on the type of load-bearing column; in some cases, shear-resistant elements are also required at the base of the columns! ! !
Lightweight structures are no problem; they are used in many places.