If slipping is a concern, you should also put up a better railing.
The building codes in most places would require balusters or otherwise closed in sides on a ramp like this. If someone does slip, they can go under the rail and off of the porch/ramp.
Also, the vertical supports for the hand railing seem insufficient. Supports for railing are generally 4x4, connected with bolts, and there would be a couple of more of them on the long run. A 200lb+ person falling has more than enough force to snap some screws through a 2x4.
If slipping is a concern, you should also put up a better railing.
The building codes in most places would require balusters or otherwise closed in sides on a ramp like this. If someone does slip, they can go under the rail and off of the porch/ramp.
Also, the vertical supports for the hand railing seem insufficient. Supports for railing are generally 4x4, connected with bolts, and there would be a couple of more of them on the long run. A 200lb+ person falling has more than enough force to snap some screws through a 2x4.