Bound To Stay Bound

		Why arches and triangles are strong (Engineering Answers)  Author: Ventura, Marne  Publisher:  Abdo (2025)  Dewey: 620.1  Classification: Nonfiction  Physical Description: 32 p., col. ill., 25 cm  BTSB No: 907434  ISBN: 9781098295912  Ages: 8-12  Grades: 3-7  Subjects:  Arches  Triangles  Building  Structural engineering
	Price: $27.46

Summary:
An introduction to arches and triangles, including the forces that hold them steady, how they are used to build sturdy structures, and more.