Third installment of a series on building a double tie-up loom, covering the materials list and construction steps. It gives approximate quantities of lumber, hardware, pulleys and cord, and explains how to scale up the plans from the previous issue's drawing. It then describes making the loom frame, heddle frames, levers, lamms, treadles and tie-up, and the final assembly. Brakes for the beams are deferred to the next issue.