[TWheels]

The construction looks superb and the ramp appears to be sturdy.
One important question is how mobile is your mother? Does she use a manual or motorized wheelchair? If manual, does she propel herself or does someone push her? I ask because I know about wheelchair use. 4 1/2 inches is a nearly impassable barrier for a manual wheelchair and for a motorized wheelchair it is impassable. The ADA standard for wheelchair ramp slope is 1 inch per foot. However, with a motorized wheelchair steeper grades can be easily navigated over short distances. With a self-propelled manual wheelchair considerable upper body strength may be required.
One suggestion: some kind of side rails, perhaps an inch or two along the sides could be very helpful. It only takes one time for the wheelchair wheels to get off the side to have a nasty fall.
I should add that the amount you sent on this ramp i roughly 5 to 10% of a purchased ramp and is much easier to move. So well done!

 

[TWheels]

Something you might want to consider is adding curbs to the sides......just in case. Per ADA or OSHA....)I can't remember which) said the curbs should be 2 inches tall. Nice safety feature in case the chair doesn't move straight up or down the ramp.

Thanks.

This is only a temporary situation. Mom can't handle the chair by herself. It is either us or the caregiver that pushes her. The ramp is wider than the door opening also.

@JIMMIEM, @MT Stringer, I see my my typing ability (and looking up the cost of a commercial wheelchair ramp) took long enough that you both posted before I did. I can vouch for what happens if the wheelchair is not straight on the ramp, and how it happens much more often than one might think. The ramp on my wheelchair modified ramp has side rails (curb about 2 inches high and even with a manual chair would not alway get straight. With my motorized chair, I still don't always get straight. Since it will be indoors and someone always pushing her I see no need for anything to improve traction.