Masonry Flashcards
6 cards from real Other Skilled Trades practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Masonry flashcards as text
What is the minimum required overlap (lap) for brick courses at corners and in running bond pattern?
Answer: 1/3 of the brick length
Minimum 1/3 overlap of the brick length is required at courses to ensure proper load transfer and structural integrity in masonry walls.
What material is used to create a control joint in a concrete block (CMU) wall to control cracking?
Answer: Rubber or foam backer rod with sealant
Control joints in CMU walls are created by raking out the mortar joint and filling with a backer rod and flexible sealant to allow for thermal movement.
What is the primary purpose of cavity wall construction in masonry?
Answer: To provide a drainage plane and thermal break between wythes
A cavity wall creates a drainage plane between the outer and inner wythes, preventing moisture from crossing into the interior and improving thermal performance.
Which ASTM standard governs the specification for mortar for unit masonry?
Answer: ASTM C270
ASTM C270 is the standard specification for mortar for unit masonry, defining the mix proportions and minimum properties for Types M, S, N, and O mortar.
What is 'tuckpointing' in masonry repair?
Answer: Removing deteriorated mortar joints and filling with new mortar
Tuckpointing involves removing deteriorated mortar from joints to a depth of 3/4 inch and replacing it with fresh mortar to restore the wall's integrity and appearance.
What type of lintel is most commonly used over openings in brick veneer walls in US construction?
Answer: Steel angle lintel
Steel angle lintels (shelf angles) are most commonly used over openings in brick veneer walls because they are strong, durable, and easy to install.