While this merchandising unit is very easy to assemble, the pieces are large and heavy and assembly requires at least two people. Please keep these instructions You are now ready to assemble the new leg: The following instructions are provided to you in the event that you need to replace one of the legs on your Instructions for how to build the Thomas Train Table · First cut the 1" x 4" and 1" x 3" into 4 pieces each to a size of 23.25" (24" - (3/4)"). The 3/4" is for Introducing the Thomas and Friends™ Wooden Railway Play Table. Click on a link below to view the Adobe PDF Format Instruction Sheet. Train Table Assembly Instructions. HARDWARE. A. Cross Dowel. Bolt x 20 pcs. 2 1/4 inches / 57 mm. B. Cross Dowel. Nut x 20 pcs. Allen Wrench.