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Measuring Information

Manual Wheelchairs

mwc-1

mwc-3
mwc-2

Seat Depth1
Measure from the most posterior point of the body to the inside of the knee, minus at least two inches. Some prefer more leg overhang to make room for their hand when lifting their leg.

Back Height2
Measured from the seat base to the top of the wheelchair back. Depends on how much upper back support is needed, and also affects freedom for the upper body to rotate.

Rear Seat to Floor3
Measurement from the ground to the rear seat edge. Relative to the front seat-to-floor dimension, this determines the rearward slope ("dump" or "squeeze") of the wheelchair seat.

Hanger Angle4
Determines how far the toes extend away from the body, measured from the horizontal. A tighter angle allows the wheelchair to turn around in less space. Depends in part on ability of the knee to bend towards the perpendicular. 

Seat Width5
Determined by the widest point of the body from knee to hip, plus an inch to ensure room to move. Consider bulk of clothing, particularly a heavy winter coat, if relevant.

Wheel Camber6
Angle of the wheel relative to the vertical. More camber improves stability and agility, but also limits ability to pass through narrow spaces. A typical daily wheelchair uses three degrees of camber.

Front Seat to Floor7
Measure the leg from the back of the knee to the sole of the foot. Then subtract the thickness of the cushion when it is compressed. Next, add a minimum of two inches for footrest clearance. Do not add the footrest clearance if the wheelchair will be foot-propelled. 

Footrest Width8
Measure from the inside of each legrest tubing the distance or desired distance between legrests. 

Center of Gravity9
Measure from the front of the seat back post to the center of the rear axle. 

Seat to Footrest Length10
Measure from the edge of the seat upholstery to the top rear of the footrest. 

Backrest Angle11
Measure the the angle of the back post to the floor. Ninety degrees will be perpendicular to the floor, to approximate the angle from the back post to the seat, subtract two degrees from measurement for every .5" of dump.

Power Wheelchairs

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Seat Depth1
Measure from the most posterior point of the body to the inside of the knee, minus at least two inches. Some prefer more leg overhang to make room for their hand when lifting their leg.

Back Height2
Measured from the seat base to the top of the chair back. Power wheelchair riders need upper back support, particularly for the moment of initial acceleration.

Hanger Angle3
Determines how far the toes extend away from the body, measured from the horizontal. A tighter angle allows the electric power wheelchair to turn around in less space. Depends in part on ability of the knee to bend towards the perpendicular. 

Seat Width4
Determined by the widest point of the body from knee to hip, plus an inch to ensure room to move. Consider bulk of clothing, particularly a heavy winter coat, if relevant.

Front Seat to Floor5
Measure the leg from the back of the knee to the sole of the foot. Then subtract the thickness of the cushion when it is compressed. Next, add a minimum of two inches for footrest clearance. Electric power wheelchairs are almost never foot-propelled by the user - so excluding the additional two inch footrest height for propelling is very rare.

Stair Lifts

Measuring your stairway correctly is essential to ensuring that your new stair lift will install easily and function safely and properly. Please follow the instructions below carefully.

Step 1: Determine Mount Side

01

Mount Side: From the bottom of your staircase looking up, determine on which side you want the lift installed. Because the lift mounts to the stairs and not the wall, you may choose either side.

Step 2: Measure for Length of Track

02

Measurement A - Top to Bottom: Stand at the top of your stairs and extend your tape measure down the staircase. The tape measure should lightly touch each stair tread and the tip should touch the landing at the bottom of the steps. The measurement should be from the front edge (nose) of the top landing to the floor at the bottom landing.

Measurement B - Top to First Step: Measure from the front edge (nose) at the top of the landing to the front edge (nose) of the first step.

Step 3: Measure the Stair Tread & Rise

03

Measurement C - Stair Tread Length: Measure the tread of a stair from front edge (nose) of a stair to back.

Measurement D - Stair Rise Height: Measure the rise of a stair by measuring the length from the front edge (nose) of one step straight down to the next tread.

Number of Risers: Count the number of stair risers on your staircase.

Step 4: Measure Top & Bottom Obstruction Distances

04

Measurement E - Top Obstruction Distance: Measure the distance from the front edge of the top step to any obstruction on the top landing. Common obstructions include doors, walls or railings.

Measurement F - Bottom Obstructon Distance: Measure the distance from the front edge of the bottom stair to any obstruction on the bottom landing.

Step 5: Measure Width of Stairs

05

Measurement G - Stair Width: Measure the width of the stairs from side to side.


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Aug 06, 2016