The quantity of vertical joints in a stretcher course equals x multiplied by the header course joints, with x defined as_________________?
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Answer: A. 1/2
Explanation
In standard brick bonding, a stretcher has twice the length of a header, meaning vertical joints follow a specific ratio. Because stretchers are twice as long as headers, a stretcher course contains half as many vertical joints per unit length. Option A is correct because the multiplier factor x for vertical joints equals one-half. Standard brick dimensions follow a modular ratio where length equals twice width plus one mortar joint thickness. Masonry bond patterns alternate between header courses and stretcher courses to ensure proper load distribution. Counting vertical joints per unit length reveals geometric relationships inherent in standard English or Flemish bonds.
Option B suggests a multiplier of one, implying equal numbers of vertical joints, which ignores brick dimensions. Option C proposes a factor of two, which inverts the actual geometric ratio of stretcher to header lengths. Option D specifies one-quarter, which does not match the fundamental dimensional proportion of standard bricks.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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