Installation Techniques & Methods Flashcards
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Read the first 7 Installation Techniques & Methods flashcards as text
What is the primary purpose of weep holes at the base of a masonry cavity wall?
Answer: To let water that collects in the cavity drain to the exterior
Weeps above the through-wall flashing let water that gets past the veneer drain out of the cavity.
Which ASTM C270 mortar type has the highest compressive strength?
Answer: Type M
Type M mortar has the highest minimum compressive strength, about 2,500 psi.
High-lift grouting of masonry walls typically requires which provision?
Answer: Cleanouts at the bottom of grouted cells
Cleanouts let mortar droppings be removed and reinforcement be inspected before tall grout pours.
How does a unitized curtain wall system differ from a stick-built system?
Answer: Unitized panels are assembled and glazed in a factory, then hung on the building as large units
Unitized curtain walls are shop-assembled and glazed, which speeds erection and improves quality control.
What is the purpose of a hydrostatic test on newly installed piping?
Answer: To verify the system holds pressure without leaks before it is concealed or put in service
Hydrostatic testing fills the piping with water at a specified test pressure to confirm there are no leaks.
A GA-214 Level 5 gypsum board finish is distinguished by what?
Answer: A thin skim coat of joint compound over the entire surface
Level 5 adds a skim coat over the whole surface for walls with critical lighting or gloss paint.
In a ballasted single-ply roofing system, how is the membrane held in place?
Answer: Loose-laid and held down by stone or pavers
Ballasted systems loose-lay the membrane and use stone or concrete pavers to resist wind uplift.
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