Asked by: Laurie Rosenlohner
sports climbing

How far apart should concrete anchors be?

Last Updated: 22nd April, 2020

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Bolts shall be spaced not more than 6 feet (1829 mm) on center and there shall be not less than two bolts or anchor straps per piece with one bolt or anchor strap located not more than 12 inches (305 mm) or less than 4 inches (102 mm) from each end of each piece.

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Similarly, you may ask, how close can concrete anchors be?

Rule: Concrete fasteners should not be set closer than 10-anchor diameters from each other.

Also Know, how far apart do drywall anchors need to be? Since drywall screws attach more securely, you can use fewer screws and space them farther apart -- 12 to 16 inches (30.5 to 40.6 centimeters) is sufficient. Adhesive tape bonds new drywall to old drywall; however, it should be reinforced using nails or screws, as well.

Also to know, how many concrete anchors do I need?

There must be an anchor bolt within 12 inches of each end. And the maximum spacing between any bolts on a single bottom plate is 6 feet. I put my anchor bolts six inches from the end of each bottom plate. Thus a (8 to 12) foot bottom plate would need three (3) anchor bolts.

How do you attach something to concrete without drilling?

How to Attach Metal to Concrete Without Screws or Glue

  1. Drill the metal where you want to anchor it to the concrete.
  2. Hold the steel in the position that you want to attach it to the concrete.
  3. Attach a concrete drill bit into a hammer drill.
  4. Drill a straight hole at each of the anchor locations to the depth of the painter's tape.

Related Question Answers

Ouasima Jose

Professional

How deep should Tapcons be in concrete?

The minimum depth of embedment for the Tapcon screw is 1 inch, and the maximum embedment is 1-3/4 inch. The depth of the hole should be drilled to allow a minimum space at the bottom of the hole of 1/2 inch. The minimum depth of the hole equals 1 inch plus 1/2 inch or 1-1/2” inches.

Nadim Fantur

Professional

What is the best concrete anchor?

Quick Overview: Our Best ?Concrete Anchors Choices
Product Price
CONFAST 1/4" (Inside/Screw 1/4" diameter) Machine Screw Anchor with 1 Setting Tool (100 per box) $42.99 BUY ON AMAZON
BEST BUDGET PICKAnsen Tools AN-133 Diamond Tip Hex Head Concrete Screw Anchor 3/16" x 1 1/4". 100 Piece With Drill Bit $11.98 BUY ON AMAZON

Eudelia Pankofer

Professional

How long should you wait to drill in concrete?

Let the concrete cure for at least 3 days before drilling. Waiting 7 days would be best before installing the anchors. Expansion anchors exert a great deal of outward force against the concrete and it takes at least 5-7 days for concrete to cure to 60% of its designed strength.

Nora Elgueta

Explainer

Do you need to use anchors in concrete?

The concrete screw represents the newest and most popular way to fasten to concrete, and it's easy to see why. All you need to do is drill a hole and drive in the screw. There's no hammering required or additional anchor or shield to install. And the screw can easily be removed if needed.

Moacir Garate

Explainer

How much weight can a 3/8 concrete anchor hold?

Technical Specifications for Drop-In Anchors
Size Minimum Embedment Max. Torque
3/8” 1-9/16” 10 ft./lbs.
1/2” 2” 20 ft./lbs.
5/8” 2-1/2” 30 ft./lbs.
3/4” 3-3/16” 40 ft./lbs.

Trancito Sturzenbecker

Explainer

What size hole do I drill for a 3/8 concrete anchor?

Drill a 3/8" hole into the concrete using a carbide-tipped bit that meets ANSI Standards B212. 15. Drill the hole a 1/2" deeper than the anchor will penetrate the concrete, making sure the minimum embedment requirements of 1-1/2" is met.

Fatemeh Peaper

Pundit

How much weight can an expansion anchor hold?

Overall, plastic expansion anchors are the least strong of all the anchors discussed here, with actual pull-out strength of around 30 pounds in concrete but as little as 10 lbs in drywall (depending on the anchor and screw size).

Revaz Toronjo

Pundit

How do you attach wood to concrete block?

How to Fasten Wood to a Concrete Block
  1. Clean the CMU block with a stiff scrub brush.
  2. Squeeze the caulk gun to apply construction adhesive to the back of the wood.
  3. Press the wood into position, then secure it with painter's tape until the adhesive sets.
  4. Mark the locations for the placement of the concrete screws into the CMU block.

Richart Serednyakov

Pundit

How do you anchor a screw into concrete?

Drill a pilot hole at the proper location with a hammer drill and masonry bit to the depth your screw will penetrate. Tap the plastic anchor into the hole. It should fit snugly but drive in easily with a hammer. If the hole gets a bit large, use a bigger screw to push the plastic against the walls of the hole.

Cliff Guery

Pundit

How deep should anchor bolts be?

The depth of the hole in the concrete for the stud anchor bolt must be a minimum of 1/2” deeper than the stud anchor bolt will penetrate the concrete. This extra space at the bottom of the hole ensures that the stud anchor bolt will not bottom out before it is embedded into the concrete at the proper distance.

Peace Bruntrager

Teacher

Can you drill into concrete without a hammer drill?

Drilling into concrete without a hammer drill can be done, but it will not be an easy task. Ideally, to drill into concrete you would want to use a hammer drill, but unfortunately not all of us have access to those kinds of drills.

Brenton Canne

Teacher

How much weight can a screw in drywall hold without anchor?

This can be 5 to 10 pounds, but keep in mind that the drywall is an extremely brittle material and, it is not strong enough to hold the weight for a longer period of time. If you don't have any anchors to use or other hardware to use, then you'll want to make sure you find a stud to drill your screws into.

Everaldo Bova

Teacher

How much weight can a stud hold?

Find a Stud
A nail in just drywall can't hold more than a few pounds of weight, but a thin nail in a wood stud can typically hold up to 20 pounds and several coarse threaded wood screws in wood studs can typically hold up to 100 pounds or more.

Nichelle Mahrt

Teacher

Can drywall anchors hold a TV?

Use a stud finder to locate the studs in your wall to determine where you can hang the TV. Do not attempt to use drywall anchors to hang it. Eventually, the anchors will get pulled through the drywall and your TV will end up on the floor.

Praxedes Torralba

Reviewer

Do I need a drywall anchor?

Simple Answer: NO – A screw directly into drywall will not hold. You need to use some type of picture hanging hardware to hang a heavy picture securely. The threads of a screw into only drywall, without an anchor, will NOT permanently hold in the drywall. It will just pull right back out sooner or later.

Heleodora Eckstedt

Reviewer

How much weight can a hollow door hold?

Hollow Door and Drywall Anchors (25-Pack) are ideal for use in hollow core doors and drywall. They offer a holding strength of up to 40 lb. in 1/2 in. drywall.

Dusan Stocklin

Supporter

What are the best drywall anchors?

The 8 Best Drywall Anchors
  • TOGGLER Toggle TB Residential Drywall Anchors.
  • TOGGLER SNAPTOGGLE BA Toggle Anchor with Bolts.
  • The Hillman Group 370054 Toggle Bolt Drywall Anchor 50-Pack.
  • ARROW 160455 Drywall Drill Bit Screw and Anchor 142-piece Kit.
  • Screw-it Self-Drilling Drywall Anchors.
  • Qualihome Expansion Drywall Anchors.

Golden Gaita

Supporter

How do I measure screw size?

Length is measured from the point at which the head sits flat with the surface, to the tip of the threads. Hex, pan, truss, button, socket cap, and round head screws are measured from right under the head to the end of the threads. Flat head screws are measured from the top of the head to the tip of the threads.