How do you cut ramp stringers?

Asked By: Maristela Zack | Last Updated: 5th February, 2020
Category: sports skateboarding
3.9/5 (1,514 Views . 16 Votes)
Use a circular saw to cut triangular stringers based on your rise and slope measurements. The nominal size of the boards you select depends on the ramp rise. For example, 2- x 6-inch lumber could be used as stringers if the rise is less than 5 1/2-inches; a rise greater than that would require a 2- x 8-inch board.

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Likewise, people ask, how do you cut ramp joists?

Cut Joists The top of the board should align with the bottom of the building. Using a torpedo level, mark a vertical line on the 2x8 (Image 1), and cut off a small piece with a circular saw (Image 2). Cut three more 2x8s using the already-cut 2x8 as a guide.

Subsequently, question is, how do you calculate the slope of a ramp? Calculating the Slope Divide the length of the ramp by the height. This will be the second number in your ratio. The first number is always one. If the ramp measures 12 feet long and the rise is 2 feet, you would divide 12 by 2 to get 6, and your ratio would be 1 to 6.

Consequently, how do you build a ramp over existing steps?

Anchor the ramp over the stairs using 4-inch screws.

  1. Extend the measuring tape from the top of the doorsill to the ground beyond the lowermost step to help determine the angle or rise of the ramp.
  2. Cut three sheets of 3/4-inch plywood to the desired length of the ramp using a circular saw.

What is the proper angle for a ramp?

Maximum slope for hand-propelled wheelchair ramps should be 1" of rise to every 12" of length (4.8 degree angle; 8.3% grade). Maximum slope for power chairs should be 1.5" rise to 12" length (7.1 degree angle; 12.5% grade). Minimum width should be 36" (inside rails) - (48" is ideal).

29 Related Question Answers Found

Do I need a permit to build a handicap ramp?

Most building codes require a permit and inspection if the wooden ramp is 30 in. or more above the ground. In addition, some locations require frost-proof footings for permanently installed ramps, while others allow you to set the ramp on treated plywood pads if it's for temporary use.

How can I get a free wheelchair ramp?

You can receive an application through your local AAAs office. If you cannot get approved through Medicaid, then you should consider free programs. The Habitat for Humanity provides a free handicapped ramp program for disabled, low-income and fixed income seniors.

How long should a ramp be for three steps?

Here are some factors that should be considered: Stairs typically run about 7.5 inches high each so for three stairs a standard rise or height would be about 22 inches. The ADA [Americans with Disabilities Act] recommends 1 foot for ramp for every one inch of rise.

How do you calculate the length of a ramp?

How long of a ramp should I buy? Determining Ramp Length: Measure total rise (how many inches from lower level to upper level) and divide by the slope.

How much does it cost to build a wheelchair ramp?


A professionally-built wheelchair ramp will cost between $939 and $2,879, with an average of $1,876. Depending on the materials chosen for the structure and the price of labor, expect to pay between $100 and $250 per linear foot. A standard unit is 30 feet long, 30 inches wide, and 30 inches high.

What is the proper slope for a wheelchair ramp?

For commercial use when somebody is sitting in the wheelchair or scooter while it climbs the ramp, ADA recommends a 1:12 slope, which means that every 1" of vertical rise requires at least 1' (12") of ramp length (5 degrees of incline). Example: A 24" rise requires a minimum ramp length of 24' (288") (24 divided by 1).

How do you build a dog ramp for deck stairs?

Dog Ramp for High Deck
  1. Step 1: Cut the Decking & Boards. I used 4x8 sheet of coated sheathing/siding I got from construction site dumpster.
  2. Step 2: Attach to the Deck.
  3. Step 3: Assemble the 2 Ramp Sections.
  4. Step 4: Build the Support.
  5. Step 5: Add Optional Rails & Carpet or Shingles.
  6. Step 6: Adding Traction.

What is the best material for a ramp?

Concrete. Concrete is the most expensive ramp option available. It is also the strongest and the most permanent. Concrete ramps can easily have excellent non-slip surfaces built in during construction.

How long should a ramp be for 4 steps?

The Americans with Disabilities Act (ADA) requires a 1:12 slope ratio for commercial ramps (ramps used in public spaces). This means that for every 1 inch of rise, 12 inches of ramp are required. For example, if an entryway is 36 inches high, you will need a ramp that is at least 36 feet long.

What is the maximum allowable slope for a ramp?


The least possible slope should be used whenever possible. The maximum allowable slope in any new construction is 1:12 with a maximum rise of 30” | 76.2 cm without a landing. A ramp with a slope between 1:12 and 1:16 can have a maximum horizontal length of 30' | 9.14 m without a landing.

How do you find the height of a ramp?

Assuming it is the length of the ramp itself, then the height would be 4.689 feet. This is because the ramp is the hypotenuse in a right-angled triangle so the height h, the ramp length r, and the angle A are related by the equation h = r sin A. Since r is 12 and A is 23 degrees, h = 12 sin(23) = 4.689 feet.

How do you find the length of a circular ramp?

The horizontal length of an arc of the ramp = 1/2 * the angular distance (in radians) * the diameter. The largest grade will be along the innermost part of the ramp, so use the diameter of the core in this formula. The vertical length of an arc of the ramp = whatever you want it to be.

How do you determine the slope?

How to Use the Formula and Calculate Slope. The slope of a line characterizes the direction of a line. To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points .

What is the standard slope of a ramp?

The desirable ramp slope standard, one inch of rise in 12 inches of run (about 8.3 percent slope), has been adopted by most building codes regardless of whether or not the access ramp is specifically for people with disabilities.

What is a 1/12 ramp?


ADA requires that all business and public use ramps adhere to a 1:12 slope ratio, meaning that for every inch of vertical rise there must be 12 horizontal inches (one foot) of ramp. If, for example, you had a stairway with a vertical rise of 21″, you would need 21′ of ramp.

How steep is a 10 percent grade?

Different symbol different meaning. the percent is rise / run * 100. Although you have it completely backwards 10% is steep and 10 degree angle is even steeper about 19%.