13.指矩（さしがね）【プロも知らない本来の使い方】規矩術や墨付け

This time, we've compiled the original usage of the Framing Square, a traditional Japanese technique. The Sashigane, considered one of the three sacred treasures for carpenters, has recently been reduced to a tool merely for drawing right angles and straight lines. We'll introduce its original purpose, including techniques for determining angles (such as the corner angle) and marking, which even professional carpenters may not know. The scale for calculating slopes can be used with both mm and shaku measurements, so don't worry. ▼Related Articles The Japanese Framing Square: Gently Introducing its Profound Usage https://carpentry-manual.com/framing-...