North Carolina Building Contractor License Practice Exam

How many rows of bridging are required for a 38 foot joist with a #8 chord member?

1. 1 row

2. 2 rows

3. 3 rows

4. 4 rows

The correct answer is: 1 row

The requirement for bridging in floor or roof joists is determined by the span of the joist and the size of the joist members. Bridging is used to stiffen joists, preventing them from twisting or bowing and ensuring a more stable structure. In the context of a 38-foot joist with a #8 chord member, building codes typically specify that bridging is required at distances based on the joist span. For a joist with a significant length like 38 feet, the general practice is to place bridging at intervals that will effectively support the structural integrity of the span. With an understanding of standard practices and building codes, the requirement for bridging can often be summarized as needing one row of bridging for certain lengths or sizes of joists, depending on the specifics of the material and designed use of the space. Thus, stating that one row of bridging is sufficient implies that the structural needs of this particular configuration have been met through standard building guidelines, especially under considerations made for the size and weight-bearing capacity of the #8 chord member when spanning 38 feet. It is also important to note that other configurations might require more than one row of bridging, depending on the joist size, spacing, materials used,