This section is from the book "Selected Woodwork Shop Problems", by George A. Seaton. Also available from Amazon: Selected shop problems.
Plate 9
There is little that need be said in regard to the construction of the simple step ladder, which is from the design of Philip S. Hasty of the Isadore Newman Manual Training School of New Orleans. The entire end of each step is let into the sides of the ladder as shown. The best cross braces for the back are made from 1/2 inch or 3/4 inch dowel rods, which must be wedged and glued into place. A small pin should be put thru the lower dowel rod just inside the side braces to prevent these from sliding while still allowing them to turn. The notch at the front end of the side braces drops over short pins which are wedged and glued into the sides of the ladder. Nails and glue are used for fastening thruout.

Plate 9. Step Ladder


 
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