NCIDQ IDFX LATEST UPDATE GRADED A

NCIDQ IDFX LATEST UPDATE GRADED A Advantages of Gypsum Drywall low install cost, quick & easy installation, fire resistance, sound control capability, easy availability, versatility, ease of finishing & decorating, ease of installation of doors/other openings Gypsum Drywall Edges Tapered: Most common; tapered on face side along the long dimension of the panel & square edges at the end; allows for application of reinforcing tape & joint compound without causing bulges at joints Square: used where appearance is NOT a factor, for basic layers of 2-layer applications & for veneer plaster work Levels of Gypsum Drywall 1: plenums above ceilings & other areas not normally open to view (tape embedded in joint compound w/ surface free of excess compound 2. water resistant backing board (all joints & angles have tape embedded in joint & one separate coat of compound 3. heavy or medium textured finishes/heavy-grade wallcovering ( 2 coats of compound) 4. Light textured or wallcoverings & where economy is concerned (3 layers) 5. all paints, severe lighting conditions (4 layers) Studs are spaced how far apart? residential: 16" O.C. commercial: 24" O.C. Slip Joint prevent wall from being damaged if the structural floor deflects Plaster Construction 1. Scratch Coat 2. Brown Coat (level surface) 3. Finish Coat (Leveling & desired texture) *Add Trim Masonry Block Dimensions 8"x8"x16" (-3/8" for mortar joints) Demountable Partitions Consists of a system of individual components that can be quickly assembled, disassembled & reused with nearly total salvageability consists of floor runners, ceiling runners, stud sections with clips to hold panels, & prefinished gyp. wallboard panels uses aluminum for framing Definition: Hinges Consist of 2 leaves with an odd number of knuckles on one leaf and an even number of knuckles on the other knuckles are attached with a pin knuckle + pin = barrel (finished with tip) Types of Hinge Tips -flat button (most common; typical) -hospital -oval head (typical) -steeple -flush Butt Hinge MOST COMMON; has both leaves fully mortised into the frame and the edge of the door so the hinge is flush with the surface of the frame and door raised barrel hinge used when there is not room for the barrel to extend past the door trim; OFFSET to allow one leaf to be mortised into the frame (kind of has an L shape on each side) swing clear hinges has a special shape that allows the door to swing 90 degrees or 95 degrees so the full opening of the doorway is available definition: latches & locksets device to operate a door, hold in position & lock it latchset ONLY holds door in place; NO lock (i.e. restroom partitions) lockset special mechanism that allows the door to be locked with a KEY or THUMBTURN mortise lockset installed in rectangular area cut out of door; more SECURE than cylindrical and offers wider variety of locking options cylindrical