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Slope on wheelchair ramp

Slope on wheelchair ramp

Slope on wheelchair ramp

(OP)
My S-I-L is in a wheelchair.
The family room (where she prefers to spend time) is down one step from the main floor.
My brother has been using a temporary ramp, but it is time to fix that.
I want to build a sturdy (but removable) ramp and am trying to decide on what slope to use.
Suggestions? Experience? Wild guess?
Thanks

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P.E. Metallurgy, consulting work welcomed

RE: Slope on wheelchair ramp

I believe the ADA standard is 1:12, or about 8 percent. For a single step, the ramp length will be 12 times the step height. If she will always have somebody available to assist her, you can make the ramp steeper.

RE: Slope on wheelchair ramp

(OP)
Yes, she cannot get around by herself so I figured that I could make it steeper.
But trying to find a good compromise.

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P.E. Metallurgy, consulting work welcomed

RE: Slope on wheelchair ramp

According to the ADA specifications, a slope of 1:12 is the absolute maximum.

https://www.access-board.gov/adaag-1991-2002.html

As noted in the above document, while 1:12 is the maximum, when it comes to the slope of wheelchair ramps, the preferred values are:

A4.8.2 Slope and Rise. Ramp slopes between 1:16 and 1:20 are preferred. The ability to manage an incline is related to both its slope and its length. Wheelchair users with disabilities affecting their arms or with low stamina have serious difficulty using inclines. Most ambulatory people and most people who use wheelchairs can manage a slope of 1:16. Many people cannot manage a slope of 1:12 for 30 ft (9 m).

John R. Baker, P.E. (ret)
Irvine, CA
Siemens PLM:
UG/NX Museum:

The secret of life is not finding someone to live with
It's finding someone you can't live without

RE: Slope on wheelchair ramp

I put in a wheelchair ramp while I was in the middle of my chemo treatment. I ended up getting one installed with an 11.8-foot slope and an inch too narrow to comply with ADA requirements. However, it works for me, it was all the room I had. I was forced to use this for 6 months last year, when I was confined to a wheelchair. I am now for the time being off chemo and walking around again, I go back to the oncologist in the middle of May to see how I did.
B.E.

You are judged not by what you know, but by what you can do.

RE: Slope on wheelchair ramp

I'm not sure what the ADA requirements are, but they likely have provision if you cannot achieve their slopes. The ramps I built for out front door were about 6" in 4' or about 1:8 slope. They were short and made it easier, safer, and smoother for me to get the wife into the house, without having to lift the wheelchair.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

RE: Slope on wheelchair ramp

This sums our requirements up quite nicely:

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

RE: Slope on wheelchair ramp

(OP)
Thanks folks, I think that covers it.
I will use all of the space that I can.
Thankfully it is only a single 6.5" step so it should work fine.

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P.E. Metallurgy, consulting work welcomed

RE: Slope on wheelchair ramp

Why not use the same slope that's been working already? If she can't maneuver and motivate on her own then the shorter the better as it will be less of a tripping hazard and the helper won't have to trudge so far. A longer ramp probably trades for worse maneuvering in a tight space at the end. They already have the mechanics and technique worked out, maybe don't "help them" by forcing them to change what works for them now?

Keith Cress
kcress - http://www.flaminsystems.com

RE: Slope on wheelchair ramp

I have a similar situation where the front door of my house has a raised landing compared to the rest of the floor plan. My nephew is in a power chair, so when his family comes to visit, I have removable ramps that I built for inside as well as getting up to the front porch. The inside ramp I built raises 6" and is 24" long (So 4:1). It works, but was super uncomfortable for him the first time (worried his power chair would tip). The one on the approach to the door raises 14" and is 6ft long (so 5:1), he did not have any issues with that one.

RE: Slope on wheelchair ramp

Just about to put a ramp into my farm.

This thread has been extremely useful.

RE: Slope on wheelchair ramp

Glad we can be of help... pipe

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

RE: Slope on wheelchair ramp



Bottom left.


Started doing the form work when I did the foundation last year but it went below freezing at night. So binned it. Still have to take the plastic and wood out the foundation smile it's been sitting under snow for the last 5 months. But I am pretty sure we can call it cured now.

Not really sure how they pour concrete into a slope.

RE: Slope on wheelchair ramp

Alistair; What's the concrete square over to the left, building foundation?

For slopes they make the concrete stiffer, remember that they have concrete they can even spray on vertical surfaces. Besides, the stiffer, the stronger it is.

If the ramp is for medical or potential medical support you should definitely include some under-insulation and heating even if you just stuff in hydronic heating hose to use later. (Do cap it so bugs don't get in) So often people blow that off and then for years and years they lament the ability to heat it even if just for dealing with ice storms.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Slope on wheelchair ramp

It's a sauna what they call belt foundation here. They put it in when they did the house foundation and septic tank

Don't know much about it or really looked at it. Apart from testing the earth spike and making sure that power cable was dead. The water is plumbed in and waste pipe.

RE: Slope on wheelchair ramp

It's a ramp to get to the back terrace and door

Pressure washer, fire wood, children. But might as well make it a friendly slope if we do have a wheelchair staying.

RE: Slope on wheelchair ramp

The ramp I built for when my parents would visit was about 10 feet long and lifted around 2 feet (5:1). The initial tilt when going down the ramp made Mom nervous, but we would keep a hand on her shoulder and the motorized wheelchair for additional stability.

RE: Slope on wheelchair ramp

(OP)
They use an Al ramp now but there are two issues.
One is the 'hump' at the top, since it has to sit on top of the floor there is a rise that you have to over before you start down.
The other is that it doesn't fit the width of the passageway very well. It doesn't fill it but there isn't enough room to walk beside it.
We will build a wooden one that fits the full width of the opening (51"), and we will stick with the current length.
It isn't too bad, a 6.5" drop over a 63" ramp is nearly 1:10.
We will also use latches to hold it solidly in place but allow for it to be removed.
Thanks all, Ed

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P.E. Metallurgy, consulting work welcomed

RE: Slope on wheelchair ramp

There's nothing like custom built alright...

Thought about a variable slope one though ( slightly sinusoidal??)
To ease the sudden drop feeling or lip as you go from flat to fixed angle and back again?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Slope on wheelchair ramp

I thought about that, but it won't help. If the slope is not constant, then the maximum slope must be greater than the average (=constant).

RE: Slope on wheelchair ramp

I agree, but if the max slope can be steeper than the average then it makes the transition nicer at the top and bottom.

Same as vehicle ramp into your garage or meeting the road so you don't bottom out.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Slope on wheelchair ramp

The wheelchair will tilt more at some other point than it did at the start of the ramp.

RE: Slope on wheelchair ramp

(OP)
The 'lips' are more about easy of entry and exit.
We were planning on short 'flatter' transitions to minimize the bumps.
On a long ramp you could build more gradual transitions, but it is much harder on a shorter one.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Slope on wheelchair ramp

Ed; Those two mods seem like they'll deliver well on your efforts.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Slope on wheelchair ramp

Question anything to note on using granite C30 concrete for my ramp. And should I ask the to stick PAV2 additive in it?

Btw I don't have a clue what granite concrete is and what the difference is to normal C30

RE: Slope on wheelchair ramp

Only thing I know is that granit is frost resistant, if the rest of the cement is that too, then it wont crack.

It might make it harder to drill in, if that would be necessary.
I have some kind of hard cement walls in my apartment with stones in, the 230VAC Hilti hammer drill from work almost can't make it. sad

“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein

RE: Slope on wheelchair ramp

Right that sounds like good stuff. Also it will look nice and sparkling.

The Mrs can even choose a colour.

RE: Slope on wheelchair ramp

Look in to cold molded boat construction. It requires no special tools, a jig saw and a screw driver for this project. Cut the ramp contours in plywood and link the cheek plates together with wooden strips. Laminate a few layers of fiberglass on top and you have yourself a lightweight, removable structure with out any bumps or such. Fiberglass is easy to bond to which makes attaching any nonslip surfaces a breeze.

RE: Slope on wheelchair ramp

today the concrete turns up!!

RE: Slope on wheelchair ramp





And the ramp



RE: Slope on wheelchair ramp

thumbsup2 Great.
Are you planing for some railings or flowerbeds or are you keeping the level differences on the sides?

“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein

RE: Slope on wheelchair ramp

Will put railings on the ramp.

Just bitten the bullet and decided to go concrete block for the barn but will do a separate thread on that

RE: Slope on wheelchair ramp

As you get older, you'll wish that you had railings on the steps as well winky smile

John R. Baker, P.E. (ret)
Irvine, CA
Siemens PLM:
UG/NX Museum:

The secret of life is not finding someone to live with
It's finding someone you can't live without

RE: Slope on wheelchair ramp

Always been thinking about rails off the Terrace but have concrete to pay for.

Will get it all done eventually need to get barn sorted next. Don't think the other one will survive another winter.

RE: Slope on wheelchair ramp

I put hand rails up for my mom then we ALL discovered how nice they are and wonder how we survived without them.

I made them myself by going to ebay and having big washers lasered out of steel. I made them to be tight on 1" steel conduit (EMT) then used a conduit bender to make the angle(s). I welded the washers to the conduit and then anchored one washer down to the concrete and screwed the other washer to the house. Worked like a charm. Oh, and I rattle-canned them heavily.

We've found the diameter of 1" EMT to be perfect for the grip. It's also the largest conduit mortals can hand bend with a bender.

Then I had to do the in-laws house once they used mine. I get appreciative comments on them annually.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Slope on wheelchair ramp

We need pictures! winky smile

“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein

RE: Slope on wheelchair ramp

(OP)
You got the size for the rails right, 1" EMT is 1 3/16".
1.25" or even 1.315" (1 NPT) all feel about right.
Anything smaller or larger is hard to grip.
There are rules on this but I don't recall them.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Slope on wheelchair ramp

Nothing with """ here is right. winky smile

“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein

RE: Slope on wheelchair ramp

1.25 <= OD <= 2.00 International Building Code

Avoid



A black swan to a turkey is a white swan to the butcher ... and to Boeing.

RE: Slope on wheelchair ramp

You get the feeling that something is missing, like the building this was supposed to be the access to.

John R. Baker, P.E. (ret)
Irvine, CA
Siemens PLM:
UG/NX Museum:

The secret of life is not finding someone to live with
It's finding someone you can't live without

RE: Slope on wheelchair ramp

(OP)
Or that somewhere there is a building without an entrance

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P.E. Metallurgy, consulting work welcomed

RE: Slope on wheelchair ramp

Not this one.


Or maybe just a low cost skate board track?

A black swan to a turkey is a white swan to the butcher ... and to Boeing.

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