STANDARD SPECIFICATIONS FOR CONSTRUCTION OF TRAILS …

Hew sill logs to provide a bearing surface for the log stringers and to provide the log stringers with a level top surface. Do not hew sill logs more than one-third their diameter. Do not level the top surfaces of the log stringers by shimming or notching their ends. 934.00.06 Log Stringers. Use logs greater than or equal to 10 feet in length. ................
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