Wheelchair Ramp Construction Tips by Brent Young The ramp it's self is easy for most to understand. Simply remember that motorized wheelchairs are quite heavy and require at least 2x6 framing. The platform at the door requires careful consideration. If the door swings out the entry platform will have to be large enough to open the door. Even if the door swings in make the entry platform large enough for the user to set an object down while opening the door. Brick, cement or block steps require concrete nails. Drive the nails into the mortar joints in brick/block structures. It's possible to break the brick/block by driving a nail into it. Powder actuated tools such as “Ramset or Hiltigun” usually don't break brick or block but be careful around the top. The top finished surface can chip off concrete or any type of masonry. Motorized wheelchairs require lag bolts or common bolts/nuts for attachment to wood bands. Use a large washer to prevent damage to the wood when tightening the bolt. Common 3 1/2 inch deck screws will suffice for manual wheelchairs. Screws are best for attaching the plywood decking. Nails tend to back out with time. Glue will prevent squeaking. Construction adhesive such as liquid nails is impervious to moisture, sap, and temperature extremes. You will need a caulking gun to apply the glue. Exterior plywood is required even if there is a roof over the ramp. ¾' plywood is recommended. I have seen mixed results with OSB. The OSB (chipboard) ramps that lasted were all finished with varnish. Varnish can be applied with a ¼ or 3/8 nap roller. Oil base varnish performs better outdoors than polyurethane varnish. Varnish cleans up with paint thinner. Notches in the joist to accommodate the top step should be cut carefully. The top step supports the joist! Water seal can be applied with a bug sprayer or paint roller. Any runs will either soak in or drip off. Materials are more expensive than ever. One will need $500 for materials if a platform is required, $350 for a simple ramp. Half sheets of plywood can be used for the ramp but I recommend whole sheets for the platform. A 2x4 cross brace at each joint in the plywood is best. Don't hesitate to ask a house framing crew for scrap plywood and lumber. If you live nearby they might even deliver the useable scrap. Anything is possible if you ask nicely.
Google is your friend! One can find many “wheelchair ramp building tutorials” with an Internet search. Helpful Links: Wooden Wheelchair Ramps http://www.rampsolutions.net/wheelchairmanual/index.htm http://www.ramps-ramps-ramps.com/wheelchair-ramp-designs.htm http://www.wheelchairramp.org/ Metal Wheelchair Ramps http://www.lincolnelectric.com/knowledge/articles/content/wheelchair_ramp.asp |