It is with all of these things in mind that we have decided to show you what we think are the ten best non-comedogenic foundations. Somewhere in our top ten picks is a foundation that will work perfectly for you and your exact skin type-along with all of the problems that may go with it.
SPAN/LOADING NOTES. Deflection limited to L/360 live load & L/240 total load. Spans based upon a stair limits of 8 max rise and 9 min. run, governing building codes may be more restrictive. Contact National Lumber EWP Engineering for design. assistance on other stair stringer applications and/or loading.
1 Socket and ratchet. 2  Stringers may be installed based on the width of the stairs or closer together where the stair treads overhand the edges of the stringers 2 or more inches.  As an added measure, install 1 1/2-inch by 36-inch framing straps at the lower edge of each stringer and the inner face of of the rim joist.