I'll be pouring a slab today. how many anchor bolts?

28 Oct.,2024

 

I'll be pouring a slab today. how many anchor bolts?

aarcuda said:

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What is standard?

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First off, use 10 inch J bolts, you need 7 or 8 inches of depth into the concrete. An 8 inch J bolt is too short.

Every bottom plate needs a minimum of 2 bolts. 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. A 16 foot bottom plate would need 4 anchor bolts.

I wet set my anchor bolts, but is would be easier if you could have them already in place before you pour. That way they are in the correct place and will not be forgotten. You can use a 2x4 connected to the form to hold the anchor bolt in place during the pour.

Goodluck...

First off, use 10 inch J bolts, you need 7 or 8 inches of depth into the concrete. An 8 inch J bolt is too short.Every bottom plate needs a minimum of 2 bolts. 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. A 16 foot bottom plate would need 4 anchor bolts.I wet set my anchor bolts, but is would be easier if you could have them already in place before you pour. That way they are in the correct place and will not be forgotten. You can use a 2x4 connected to the form to hold the anchor bolt in place during the pour.Goodluck...

How to Use Drywall Anchors

Sleeve Anchor Threaded Corkscrew Wing Anchor Straight plastic insert Corkscrew plastic or metal insert Metal wings and metal bolt Use for small pictures and light mirrors Use for shelves. light cabinets, and towel bars Use for shelves, heavy mirrors or pictures, orTV mounts 20 pound capacity 50 pound capacity 100 pound capacity

The Spruce / Theresa Chiechi

Safety Considerations

Heavy items such as pedestal sinks, large furniture, and kitchen wall cabinets should not be installed on the wall with drywall anchors. Instead, attach heavy items firmly to wall studs.

How to Install a Sleeve Anchor

You'll need the plastic sleeve anchors plus the provided screws. For tools, use a flathead or a Phillips screwdriver, drill, driver bits, a set of drill bits, and a hammer.

The Spruce / Margot Cavin&#;
  1. Select the Drill Bit

    Consult the instructions on the drywall anchor package to select the correct size of drill bit. If you do not have the instructions, estimate the bit size by comparing the bits to the shaft of the sleeves.

    Tip

    When in doubt, use a smaller bit than the one that seems appropriate. You can always enlarge the hole if needed.

    The Spruce / Margot Cavin

  2. Drill the Hole in the Drywall

    Fit the drill bit in the drill. Drill a hole in the drywall.

    The Spruce / Margot Cavin

  3. Tap the Sleeve In

    Push the sleeve into the hole by hand. If the sleeve is tight, gently tap it with the hammer until it is flush with the drywall.

    Tip

    If the sleeve resists, do not continue to tap. Instead, remove it, drill a slightly larger hole, then insert a new sleeve.

    The Spruce / Margot Cavin 

  4. Drill the Screw in the Sleeve

    Drill the screw clockwise into the plastic sleeve with a drill or with a manual screwdriver.

    The Spruce / Margot Cavin 

How to Install a Threaded Corkscrew Anchor

Along with the plastic or metal corkscrew anchor, you'll need a hammer, small nail, and screwdriver.

  1. Pierce a Hole

    For nylon (plastic) anchors, create a small start hole by tapping a nail into the drywall's paper. Metal anchors do not need a start hole as they are strong enough to create a hole on their own.

    The Spruce / Colleen & Shannon Graham

  2. Twist the Anchor Until Flush

    Place a Phillips or flat-head screwdriver in the notched head of the anchor. Turn clockwise. Apply firm (but not hard) pressure, to draw the anchor into the drywall.

    The Spruce / Colleen & Shannon Graham

  3. Finish the Anchor

    Turn the anchor until it is flush with the drywall paper. Do not twist too hard or you risk stripping the head of the anchor.

    The Spruce / Colleen & Shannon Graham

  4. Add Screw

    Add the provided screw to the drywall anchor.

    The Spruce / Colleen & Shannon Graham

How to Install a Wing-Style Anchor

You'll need a drill, drill bits, and a screwdriver to attach a wing style anchor on drywall.

  1. Drill the Hole

    Consult the product's instructions for the diameter of the drill bit to use to drill the hole.

    The Spruce / Colleen & Shannon Graham

    For more anchor bolt installationinformation, please contact us. We will provide professional answers.

  2. Attach the Bolt to the Item

    If the bolt is attached to the wings, detach it. Slide the bolt through the hole in the item you want to attach to the wall.

    The Spruce / Colleen & Shannon Graham

  3. Put the Wings on the Bolt

    Thread the wings onto the bolt. Make sure that the open part of the wings is facing toward the head of the bolt.

    The Spruce / Colleen & Shannon Graham

  4. Insert the Wings and Bolt in the Hole

    Compress the wings until they are flat. Slide this into the hole. You may feel or hear the wings snap open once they are in the hole.

    The Spruce / Colleen & Shannon Graham

  5. Pull the Wings Ahead

    With one hand, pull the bolt and its attached item toward you. You should feel the wings touch the back of the wall. Maintain this pressure. With the other hand, use a screwdriver or drill to turn the bolt clockwise.

  6. Fasten the Bolt and Item to the Wall

    Continue turning clockwise until the item is securely fastened to the wall. Do not overtighten.

    The Spruce / Colleen & Shannon Graham

How to Remove Drywall Anchors

Drywall Sleeve Anchor

You'll need a drill, a flathead screwdriver, and needle-nose pliers to remove a sleeve-style drywall anchor.

  1. Remove Screw

    With the manual screwdriver or cordless drill, remove the screw from the plastic sleeve.

    The Spruce / Margot Cavin

  2. Pry up Side of Sleeve

    The anchor's plastic sleeve has a flange that rests flat against the face of the drywall. Use the flathead screwdriver to pry up the edge of the flange.

    The Spruce / Margot Cavin

  3. Remove With Pliers

    Grab the edge of the flange with the needle-nose pliers. Pull the anchor sleeve straight out.

    The Spruce / Margot Cavin

Drywall Threaded Corkscrew Anchor

Remove the item and screw from the anchor. Place a screwdriver end onto the notched head of the anchor. Turn counter-clockwise until the anchor is free.

Tip

If the anchor head strips or otherwise cannot be removed, tap it about 1/8 inch into the wall, cover with drywall compound, then paint.

Drywall Wing Style Anchor

With a screwdriver, turn out the bolt counter-clockwise. The wings will drop into the wall. Remove the item from the bolt.

FAQ

  • When should you not use drywall anchors?

    Weight restrictions are your primary reason for not using drywall anchors. If you're mounting heavy items, locate the wood studs and mount your item using them. Studs are spaced every 16 to 24 inches. Drywall anchor packaging will list limitations and often require a certain wall thickness to be effective. Most drywall is a 1/2-inch inch thick. Never use a drywall anchor on ceilings unless it's made for that purpose.

  • Can you install drywall anchors without a drill?

    You don't need a power drill to install anchors. You can create a pilot or guide hole by using a nail or screw and a few hammer taps. Once you get the hole started and start twisting the screw into the anchor, like an expansion anchor, it splits the anchor's body to hold it in the drywall.

  • Why are my drywall anchors pulling out?

    An anchor can fail for several reasons, including the item you're hanging is too heavy, the hole for the anchor is too big, the screws going into the anchor are not the right size, and the drywall (or plaster) is old, damaged, and not stable enough. You might need to replace it with a screw-in anchor, a molly bolt, toggle bolt, or another hollow-wall fastener.

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