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Fire-Resistive Walls and Electrical Boxes

Q: What are the requirements for maintaining the fire integrity of a fire-resistive wall when installing electrical boxes? A: According short answer is that it depends on not only the size of the...

Steel Stud Curtainwall System Terminations

Q: Can you help me understand the dynamics of steel stud curtainwall systems where the wall terminates into a concrete floor slab? A: This is the one area of the exterior envelope that...

Chase Walls

Q: Can you provide some information on chase walls? A: Chase walls are typically comprised of a double row of framing studs, providing extra depth of wall that serves as a vertical and...

Keeping the Fire Rating

Q: How do you maintain the integrity of a fire-rated wall when you have to penetrate the gypsum panels for electrical outlet boxes? A: The term “fire-rated” often refers to a wall assembly...

Joints 101

Q: Can you clarify the differences between control joints, expansion joints, aesthetic joints and construction joints? A: Control and expansion joints are designed to accommodate movement, whereas the aesthetic joint is simply for...

Sheathing Damage

Q: I have had inspectors challenge me on installed glass mat gypsum sheathing. Can you provide me with tips on allowable gaps and repair procedures? A: Incidental damage to gypsum sheathing, in general,...

Sealant on Acoustically Rated Steel Partitions

Q: Please explain the use of sealant on acoustically rated steel framing partitions. Can you provide me with some tips on how to apply this sealant? A: There are four factors that help...

Special Inspections

Q: I’ve been hearing a lot about the requirement for “special inspections.” Can you give me some background information? A: Special inspections have been in place for quite a few years now and...

Fire Testing Exterior Walls

Q: I’m working on a project where the exterior envelope is part of the bid package. In the construction documents there is a requirement for the exterior wall to meet NFPA 285 testing. What is...