Wall Framing in Masonry
You must be aware of the methods used in furring masonry walls in order to install the interior finish.
A sequence of installation should be established for nailing the furring strips to the wall. Either start from the right and work to the left, or work from left to right. This sequence will allow the person doing the trim work to locate the furring strips.
When applying the furring strips to the wall, remember that the strips must be nailed properly. Start the first strip at 15 ¼” and then lay out the second strip 16” from the first mark. Laying out furring strips is done in the same way as laying out wall studs.
Framing Door and Window Opening in Masonry
In modern construction, metal door frames and metal window frames or channels are used almost exclusively with masonry walls. However, in rare instances, wood framing is used.
Each installation in unique and a complete examination of this subject is beyond the scope of this module.
There are two general rules, however, that apply to wood framing:
Use treated wood in cases where the wood is in direct contact with masonry.
Use cut nails, expansion bolts, anchor bolts, or other fasteners to attach the wood to the masonry securely.
Steel Studs in Framing
Depending on the gauge, steel studs are typically stronger, lighter, and easier to handle than wood.
Unlike wood studs, steel studs will not split, warp, swell, or twist. Furthermore, steel studs will not burn as wood studs would.
Steel studs are currently more expensive than wood studs, but it is expected that as lumber prices continue to rise, the costs will eventually equalize.
Steel studs have become popular in residential, commercial, and industrial construction.
• Steel studs may be spaced 16” or 24” OC. On a nonbearing wall, spacing is determined by the type and thickness of the drywall.
• Unlike wood (which has defects), steel studs are consistent in material composition.
• Steel studs are pre-punched to permit quick installation of piping, wiring, and bracing members.
There are three types of steel studs. Click on each button to find out more:
Used for nonbearing walls that have facings to accept drywall
Will accept lath and plaster on both interior walls
Is a wide-flange steel stud, which is used for both load bearing and nonbearing walls
A wide variety of accessories are available for steel studs. There are tracks for floors and ceilings to which the studs are fastened. Tracks are also available for sills, fascia, and joint-end enclosures.
Other accessories include channels, angles, and clips. For residential construction, steel trusses are also available.
For layout, steel studs are marked to the centerline rather than the edge. The open side of the stud should always face the beginning point of the layout. The bottom channel is fastened to the concrete floor with small powder-actuated fasteners.
(Note that the T- channel is held back slightly to allow room for the drywall to slide between the two channel sections.)
A metal self-tapping screw is used to fasten the studs to the track. The electric screw gun takes the place of the hammer.
The studs may also be welded instead of screwed.
When constructing a rough opening, two studs are put back to back and screwed or welded together. The stud that will act as the trimmer stud will be cut to the height specified to receive the header. A section of floor track can be used for the bottom part of the header, with short pieces of studs put in place over the header and secured in place. Blocking may be required to fasten millwork.