16th Edition Steel Construction Manual Jigsaw Puzzle 16th Edition Steel Construction Manual Even before you cover your Steel Construction Manual with Post-Its, the production team (located right here in the U.S.!) uses them to add the popular thumb cuts feature! Each of the index stickers you see in the photo designates a tick mark printed on the edge of the page. One by one, the skilled warehouse team punches half-circle die cuts for each thumb cut. Kudos to Lakeside Book Company and Bind-Tech for helping to bring the Manual to life! Celebrate the latest printing of the 16th Edition Steel Construction Manual--and the handcrafting behind it--with our digital jigsaw puzzle of the week.