CSLB C-17 Glazing (Trade Exam) — All Questions

Where does one manufacturer call for vertical expansion joints in a stick curtain wall?

• a.At every tenth floor
• b.At the roof only
• c.At the base of the wall only
• d.At every floor✓

The guideline calls for a vertical expansion joint at every floor, at glass corners and never along an edge of an insulating unit. A joint at the roof only, at the base only or at every tenth floor leaves long runs unable to move.Pilkington ATS-192 General glazing guidelines (2013)

Column lines are 40 feet apart. One guideline spaces horizontal expansion joints at each column line or within 30 feet, whichever is less. What is the maximum spacing?

• a.40 feet
• b.30 feet✓
• c.60 feet
• d.10 feet

The lesser distance controls, so joints are no more than 30 feet apart. Forty feet is the column spacing, 60 is a multiple, and 10 is not the rule.Pilkington ATS-192 General glazing guidelines (2013)

Which code provision covers glass in curtain walls, storefronts and glazed partitions?

• a.No seismic provision applies to glass
• b.The seismic provisions of ASCE 7, Section 13.5.9✓
• c.The section on fire-resistance ratings of the wall
• d.Only the section on design wind loads

The code says glass in glazed curtain walls, storefronts and glazed partitions meets the seismic requirements of ASCE 7 Section 13.5.9. Wind alone is incomplete, seismic provisions do apply, and fire resistance is a different topic.2025 CBC §2404.1

What does the code require when one or more sides of a glass pane are not firmly supported?

• a.A written statement from the glass supplier
• b.Analysis by a registered design professional✓
• c.A note on the shop drawing by the glazier
• d.A thicker lite chosen by the installer on site

The code requires detailed documents and analysis or test data prepared by a registered design professional. A glazier's note is not engineering, a supplier's statement does not come from a design professional responsible for the building, and an installer's on-site choice of thickness is not an analysis of the unsupported edge.2025 CBC §2403.2

For school and hospital work, how must unitized framing be attached to the building?

• a.By friction clips that hold the frame in place
• b.By gravity and friction, if the frame is heavy
• c.By screws or bolts, not by gravity or friction✓
• d.By sealant bonded to the slab edge

The code's provisions for those jurisdictions require anchoring by screws or bolts and say framing shall not rely on gravity or frictional forces for attachment. Weight is a gravity method, a sealant bond is adhesion, and friction clips are a frictional method, so each is excluded by name or by kind.2025 CBC §2410.1.1