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Show BUILDERS TO USE TREENAILS How Framework of Ships Under Construction Con-struction for Uncle Sam Will Bo Held Together. The framework of the wooden ships which are now being built for the United States Emergency corporation will not be held by even a single metal nail. They will be pinned together with treenails cut from the trunks of live oak or yellow locust trees. There are two or three causes for the use of wooden nails. One Is the great need of Iron and steel In other lines of war activity where wood could not be used, and another is that the wooden pin Is lighter than a metal one and less expensive. Each ship's hull will require 300,000 of the treenails, and they will be fastened In place by splitting each end and driving In a white oak wedge. Each ship will require 600,000 wedges. It Is said that the wooden pins are more quickly put in place than are metal ones. Treenails are 24 Inches long, an Inch and a quarter In diameter and perfectly round. They are used to fasten the planks to the boat frames. Soon after a vessel Is launched the pins swell to a snug fit in the framework. frame-work. Timber for the ships comes froc? the sawmills In 60-foot slabs 14 inchet through, and Is then worked into the different sizes for the framework and siding. |