be safe against injury under the heaviestload which occurs in practice, and to form and fit every jjair of such sur-faces accurately in order to distribute the stress uniformly. 4. To proportion the fastenings so that they may be of equal strengthwith the pieces which they connect. 5. To place the… … Fig-. 302.Marking- by Superposition. the joined pieces. Then, if the gaged line should be slightly more orless than half the thickness of the pieces the closeness of the jointwould not be aifected. 2. ]yhen possible, in hnjing out a joint, use the method of super-position, Fig. ;30-3. By this is…
Woodwork
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