General Contractor Practice Exam

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What is the required thickness of head and bed joints in glass masonry?

1/8 inch
1/4 inch
1/2 inch
3/4 inch

The correct answer is: 1/4 inch

The required thickness of head and bed joints in glass masonry being 1/4 inch is crucial for ensuring both structural integrity and the aesthetic appearance of the finished wall. A 1/4 inch joint allows for adequate mortar coverage, which helps secure the glass units in place while also allowing for slight adjustments during installation. This thickness accommodates potential expansion and contraction of the materials due to temperature changes, providing some flexibility and reducing the risk of cracking or other stress-related issues. Using a mortar joint that is too thin might not provide sufficient bonding and support, while a joint that is too thick could lead to an unattractive appearance and may compromise the overall structural performance. Understanding these requirements is essential for achieving a well-constructed glass masonry wall that meets both functional and design standards.