Skyline
DP24 Deep Notch Joist Repair Kit
DP24 Deep Notch Joist Repair Kit
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The DP24 Deep Notch Repair Kit (Patent Pending) restores the strength of Floor Joists resulting from very deep notch cuts from the bottom of the Joist up. The DP24 has been tested and found suitable for tension repairs where the notch cut is from the bottom of the joist up. The DP24 works for notches up to 6" wide. Please download the engineering report for additional details. The DP Series can be used in conjunction with our other joist repair kits to maximize strength and "fall" of drain lines where a slop is required for proper drainage, and of course in situations where joist damage is severe. Works with as little as 2" of wood remaining at the top of the Joist. DP Installation / Design Guide
Deeply cut floor joists which leave only a small section of wood for support are a difficult problem to solve. The DP24 provides the solution with heavy duty steel and structural fasteners that more than make up for the lost support.
The DP24 will repair a notch up to 6" wide. If the notch you need to repair is wider, check out the DP30 for notches up to 12" wide
- Maximum Dead Load: 12psf
- Maximum Live Load: 40psf
Kit includes the following:
- 1) 24" A36 carbon steel strap
- 32) Simpson 1/4" hex head structural lag style screws
- 1) 3/8" nut driver (1 per Order)
- 1) 3/16" drill bit for pre-drilling fastener holes (1 per Order)
- 1) Instructions

Installation Videos
Notched Joist Repair - DIY
Repairing deep notches in your floor joists may seem like a daunting task, but we have designed and manufactured our products to be friendly to both contractors and do-it-yourself homeowners. We supply all the fasteners and bits you need - just use your own drill or driver!
Helpful Resources for our joist repair products
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Technical Bulletin
Technical BulletinFind metallurgical information, engineering examples, fastener properties and more in our technical bulletin.
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Product Kit Includes:
Installation Directions -
Tools Needed:
- Screwgun and Drill (Electric or Cordless)
- Construction Adhesive (optional)
- 5/32" Drill bit (Included)
- Torx T25 Driver tip (included)
- "C" Clamps (may be useful)
What size notch is allowed in a joist with and without a joist repair plate?
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What building code says about notches in floor joists (without a reinforcer)
- Notches are only allowed in the first 1/3 from each end of the Joist.
- Notch depth cannot exceed 1/6th of the depth of the Joist.
- Notch width cannot exceed 1/3rd of the depth of the Joist.
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With a Notch Repair Plate
- Notches can be placed anywhere along the length of the Joist up to 12" from supporting members.
- Notch can be up to 3" deep on a 2x10 or 12.
- Notch width can be up to 5" wide.
Returns, Refunds, and Shipping Policies
With the exception of weekends, we make every attempt to ship orders within 24 hours of when they are received. Some orders that are placed early in the day may ship that day while others may not. If your project requires faster service please call and we will do our best to accommodate your needs.
Please include mobile phone and email for tracking via text and email. We use your contact information to provide you with updates on your orders.
Other Frequently Asked Questions
Do you offer quantity discounts?
If you would like to purchase a bulk order of our joist repair plates, please call us at 540-589-9669
What countries are joist repair products available in?
Available in the US, UK, Canada, and France. For availability in other countries please call - 540-589-9669
Who do I contact for questions?
Please email dan@joistrepair.com
Can I DIY my own joist repair?
You definitely can! Please review our installation videos for the steps on how to install our structural joist repair plates.
What is the difference between a deep and shallow notch on a joist?
The depth of the notch determines whether you need a deep or shallow notch reinforcer to repair your damaged joists.