What is the allowable shear in pounds for a 1-inch bolt embedded 21 inches into adobe masonry?

To understand why the allowable shear for a 1-inch bolt embedded 21 inches into adobe masonry is correctly identified as 500 pounds, it's important to consider the properties of both the bolt and the masonry material.

The shear strength of a bolt is a critical factor in determining how much load it can safely withstand without failing. For a 1-inch diameter bolt, industry standards and engineering guidelines provide specific shear values based on the type of material it is anchored into—in this case, adobe masonry. The 21 inches of embedment also plays a significant role because greater embedment typically increases the load-carrying capacity by allowing for more effective load distribution.

In the context of adobe, which has been recognized for its unique properties, the determined shear strength is essential for design and construction, where safety and structural integrity are paramount. The 500-pound value likely reflects the material's inherent shear characteristics along with the bolt's mechanical properties when securely installed. This conclusion aligns with standard practices in residential construction and ensures developers can confidently calculate loads and design structures that meet safety codes.

Therefore, the allowable shear of 500 pounds represents a solid conclusion based on the interaction between the bolt dimensions, embedment depth, and the material properties of adobe masonry.