Introduction: How to Build a Cofferdam Brace

Picture of How to Build a Cofferdam Brace

When using cofferdams for flood control on slopes, a bracing system is necessary. This DIY Instructable will guide you through five simple steps to help you build your own cofferdam brace.

To build a cofferdam brace, you will need the following:
    - Safety glasses - SAFETY FIRST!
    - Three 10' 2x4s (new or used)
    - 16 3" #8 self-drilling screws or nails
    - Hand saw with miter box
    - Screwdriver or Drill with driver head
    - Hammer (if using nails)
    - Tape Measure
    - Protractor
    - Pencil

Step 1: Cut the Wood

Picture of Cut the Wood

Cut the pieces of the brace to the dimensions and angles shown on the drawing.

Step 2: Assemble

Picture of Assemble

Screw or nail the pieces of the brace together.  Be sure to use the dimensions from the drawing to assemble the brace correctly.

Step 3: Repeat

Picture of Repeat

Now repeat steps 2 and 3 to make a second brace.

Step 4: Connect Braces With a Beam

Picture of Connect Braces With a Beam

Connect an 8' beam over the top of both braces as shown in the picture.  This can be done with screws or nails.

Step 5: Setup

Picture of Setup

Set the bracing system 6' from each side of the cofferdam.

Step 6: How to Build a Cofferdam Brace

The step-by-step instructions with drawings and pictures are on the attached file.


Jacko77 (author)2012-03-30

Post Presidential Award!

Utah89 (author)2012-03-29

These kids developed this project for their middle school's SAME SMP team and presented it today at the competition.

They did a great job and this is a really great solution for bracing cofferdams on slopes.

Fingers crossed that they earn some awards from the competition.

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