How do you calculate a wheelchair ramp?

Try the 14.5° rule, 3:12 ratio. You can calculate this by dividing the rise in inches by 3 (24 inch rise requires an 8 foot ramp; 36 inch requires 12 foot ramp).

phc-online.com - How to Measure For a Ramp Wheelchairs & Scooters - PHC-Online

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How to Measure for a Ramp Wheelchairs & Scooters

Folding Ramps choose Single-Fold or Tri-Fold

Threshold Ramps choose Entry Way or Transistion Ramp

Gateway Permanent Ramps & Walkways

How to choose ramp length:

16.5° 34"

15.5° 32"

14.5° 30"

17.0° 13.5° 28"

15.7° 12.5° 26"

16.6° 14.5° 11.5° 24"

15.2° 13.2° 10.6° 22"

16.1° 13.8° 12.0° 9.6° 20"

14.5° 12.4° 10.8° 8.6° 18"

15.5° 12.8° 11.0° 9.6° 7.7° 16"

17.0° 13.5° 11.2° 9.6° 8.4° 6.7° 14"

14.5° 11.5° 9.6° 8.2° 7.2° 5.7° 12"

16.1° 12.0° 9.6° 8.0° 6.8° 6.0° 4.8° 10"

14.5° 10.8° 8.6° 7.2° 6.2° 5.4° 4.3° 9"

12.8° 9.6° 7.7° 6.4° 5.5° 4.8° 3.8° 8" 17° 11.2° 8.4° 6.7° 5.6° 4.8° 4.2° 3.3° 7" 14.5° 9.6° 7.2° 5.7° 4.8° 4.1° 3.6° 2.9° 6" 12° 8.0° 6.0° 4.8° 4.0° 3.7° 3.0° 2.4° 5" 9.6° 6.4° 4.8° 3.8° 3.2° 2.7° 2.4° 1.9° 4" 7.2° 4.8° 3.6° 2.9° 2.4° 2.0° 1.8° 1.4° 3" 2' 3' 4' 5' 6' 7' 8' 10'

RISE IN INCHES RAMP LENGTH IN FEET

Ramp incline chart:

Calculations apply not only to walkers, manual wheelchairs, power wheelchairs and scooters, but also to individuals that may have impaired walking due to injury, amputation, surgery, or balance issues.Folding Ramps have a maximum length of 10' and that is the maximum length ramp we offer.Public and commercial properties we recommend you stick with the ADA requirements of 4.8° and the longer ramp lengths.The incline chart below will help calculate the length of ramp needed for most situations and settings., the ADA standard ratio (for commercial & public properties) is 1:12 slope which means for every 1" of vertical rise you are required to have at least one foot of ramp (4.8° incline). And this is for loading unoccupied wheelchairs/scooters.However, for home use, this is not always achievable or practical. Try the 14.5° rule, 3:12 ratio. You can calculate this by dividing the rise in inches by 3 (24 inch rise requires an 8 foot ramp; 36 inch requires 12 foot ramp). See the chart below.Always consult your equipment's owner guide to see what degree of incline is recommended. A typical power wheelchair recommended incline capability is about 9.6° with the patient in the chair or scooter and about 14.5° unloaded. Pushing a manual wheelchair can be difficult or easy depending on: ramp length + patient weight.(all measurements in degrees)(all measurements in degrees)

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At what height does OSHA require guardrails?

42 inches The top edge height of top rails, or equivalent guardrail system members, are 42 inches (107 cm), plus or minus 3 inches (8 cm), above the walking-working surface.

osha.gov - 1910.29 - Fall protection systems and falling object protection - OSHA

1910.29(b)(15)

Manila or synthetic rope used for top rails or midrails are inspected as necessary to ensure that the rope continues to meet the strength requirements in paragraphs (b)(3) and (5) of this section.

Note to paragraph (b) of this section:

The criteria and practices requirements for guardrail systems on scaffolds are contained in 29 CFR part 1926, subpart L. Figure D-11 -- Guard Rail Systems. Depicts two figures showing two types of Guard Rail Systems. The first shows the walking-working surface, posts, and mid rail for guard system. Total height measurement 42 IN (±3 IN) (107 CM ±8 CM). The second shows a different guard rail system with several more posts, Top Rail, and intermediate vertical member. Spaces between each post and intermediate vertical member is 19 IN (48 CM) MAX. Height of Guard rail is 42 IN (±3 IN) (107 CM ±8 CM).

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