Post on 29-Mar-2015
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Unit 8Unit 8Fastening SystemsFastening Systems
Nails • Staples • Screws • Bolts • Hollow-wall Fasteners • Solid
Concrete or Solid Masonry Wall Anchors • Drive Pins and Studs •
Metal Connectors • Adhesives
Nails • Staples • Screws • Bolts • Hollow-wall Fasteners • Solid
Concrete or Solid Masonry Wall Anchors • Drive Pins and Studs •
Metal Connectors • Adhesives
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Nails are available with a variety of heads and points. Flat‑head, diamond‑point nails are most often used by carpenters.
Nails are available with a variety of heads and points. Flat‑head, diamond‑point nails are most often used by carpenters.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Nail sizes are designated by a number and the letter d.
Nail sizes are designated by a number and the letter d.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Common nails are used most often for rough work.
Common nails are used most often for rough work.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Masonry nails can be driven into concrete or masonry.Masonry nails can be driven into concrete or masonry.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Nails used for finish work are thinner than nails used for rough work.Nails used for finish work are thinner than nails used for rough work.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Wood fibers apply pressure against the shank of a nail to give a nail its holding power.
Wood fibers apply pressure against the shank of a nail to give a nail its holding power.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Nail shanks are smooth or deformed. Deformed-shank nails provide greater holding power than smooth-shank nails.
Nail shanks are smooth or deformed. Deformed-shank nails provide greater holding power than smooth-shank nails.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Heavy-duty staples may be used to fasten plywood sheathing and subflooring. Light-duty and medium-duty staples are used for attaching molding and other interior trim.
Heavy-duty staples may be used to fasten plywood sheathing and subflooring. Light-duty and medium-duty staples are used for attaching molding and other interior trim.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
The three basic screw heads are flat, round, and oval. Screw heads have a single slot or a recessed cross slot.
The three basic screw heads are flat, round, and oval. Screw heads have a single slot or a recessed cross slot.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A higher gauge number for screws indicates a thicker screw shank.A higher gauge number for screws indicates a thicker screw shank.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Shank and pilot holes should be drilled when using wood screws to fasten wood pieces together.
Shank and pilot holes should be drilled when using wood screws to fasten wood pieces together.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Self-tapping screws are used to fasten metal framing members to each other by tapping their own threads in the metal members.
Self-tapping screws are used to fasten metal framing members to each other by tapping their own threads in the metal members.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Concrete screws are used to fasten items to concrete, brick, or block without the use of additional anchors.
Concrete screws are used to fasten items to concrete, brick, or block without the use of additional anchors.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Machine screws have greater holding power than other types of screws that fasten to metal.Machine screws have greater holding power than other types of screws that fasten to metal.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Panel screws have coarse, steeply pitched threads in comparison to a standard wood screw.
Panel screws have coarse, steeply pitched threads in comparison to a standard wood screw.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Construction-grade panel screws are driven with coil or strip-type screwguns. An extension handle may be added to screwguns to allow carpenters to install screws from an upright position.
Construction-grade panel screws are driven with coil or strip-type screwguns. An extension handle may be added to screwguns to allow carpenters to install screws from an upright position.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Bolts are used to fasten together heavy wood and metal materials.Bolts are used to fasten together heavy wood and metal materials.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
The shank below a carriage bolt head is embedded in the wood.
The shank below a carriage bolt head is embedded in the wood.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Lag bolts are often used when it is inconvenient or impossible to use a nut‑and‑bolt arrangement. A washer should be used under the head.
Lag bolts are often used when it is inconvenient or impossible to use a nut‑and‑bolt arrangement. A washer should be used under the head.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A toggle bolt consists of a machine screw with a winged nut that folds back as the assembly is pushed through a predrilled hole in the wall.
A toggle bolt consists of a machine screw with a winged nut that folds back as the assembly is pushed through a predrilled hole in the wall.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
When installing a screw anchor in a hollow wall, the shield spreads and flattens against the interior of the wall as the screw is tightened.
When installing a screw anchor in a hollow wall, the shield spreads and flattens against the interior of the wall as the screw is tightened.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A wallboard anchor does not require predrilling prior to installation.
A wallboard anchor does not require predrilling prior to installation.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A rotary hammer may be used to drill holes in concrete.
A rotary hammer may be used to drill holes in concrete.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A variety of masonry and core bits are used with electric drills or rotary hammers.
A variety of masonry and core bits are used with electric drills or rotary hammers.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Light‑duty plastic anchors are used with wood or sheet‑metal screws.
Light‑duty plastic anchors are used with wood or sheet‑metal screws.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Light‑duty lead‑alloy anchors are used with lag, wood, or sheet-metal screws. Light‑duty lead‑alloy anchors are used with lag, wood, or sheet-metal screws.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
The anchor of a hammer-driven anchor expands as the expander pin is driven in.
The anchor of a hammer-driven anchor expands as the expander pin is driven in.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
The slotted head of a hammer‑driven nylon anchor allows the expander pin to be removed with a screwdriver.
The slotted head of a hammer‑driven nylon anchor allows the expander pin to be removed with a screwdriver.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
When installing a lag bolt expansion shield, the shield expands as the bolt is tightened.
When installing a lag bolt expansion shield, the shield expands as the bolt is tightened.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A heavy-duty machine bolt expansion shield expands at both ends to distribute the anchor load.
A heavy-duty machine bolt expansion shield expands at both ends to distribute the anchor load.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
The expansion plug expands the steel anchor as the anchor is driven onto the plug with a setting tool.The expansion plug expands the steel anchor as the anchor is driven onto the plug with a setting tool.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A self-drilling anchor is placed in a special chuck head that is adapted for a rotary hammer.A self-drilling anchor is placed in a special chuck head that is adapted for a rotary hammer.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Stud-bolt anchors are used to fasten large equipment and machinery in place.
Stud-bolt anchors are used to fasten large equipment and machinery in place.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A tube-dispensed adhesive is mixed as it is forced down the nozzle.
A tube-dispensed adhesive is mixed as it is forced down the nozzle.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A glass capsule adhesive anchor consists of a sealed glass capsule containing an adhesive mixture, a stud-bolt, and a nut and washer.
A glass capsule adhesive anchor consists of a sealed glass capsule containing an adhesive mixture, a stud-bolt, and a nut and washer.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Many types of drive pins and studs can be driven into concrete or other masonry.Many types of drive pins and studs can be driven into concrete or other masonry.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A powder‑actuated tool is used to drive pins and studs into concrete or other masonry.
A powder‑actuated tool is used to drive pins and studs into concrete or other masonry.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Metal fasteners are used to tie together members in wood‑framed construction.
Metal fasteners are used to tie together members in wood‑framed construction.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Metal connectors aligned vertically provide the most effective protection against wind damage.
Metal connectors aligned vertically provide the most effective protection against wind damage.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Manufacturers may stamp the recommended nail size on metal connectors.
Manufacturers may stamp the recommended nail size on metal connectors.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
A pneumatic nailer must be fitted with a hole-locating mechanism or be designed to expose the nail tip when driving nails for metal connectors.
A pneumatic nailer must be fitted with a hole-locating mechanism or be designed to expose the nail tip when driving nails for metal connectors.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Machine bolts may be used to fasten metal connectors to larger framing members.
Machine bolts may be used to fasten metal connectors to larger framing members.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Glue is used to help fasten the joints of cabinets.Glue is used to help fasten the joints of cabinets.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
Tubes that fit into caulking guns are the most convenient way of applying mastics to the upper surfaces of floor joists.
Tubes that fit into caulking guns are the most convenient way of applying mastics to the upper surfaces of floor joists.
Unit 8 — Fastening SystemsUnit 8 — Fastening Systems
When panels with tongue-and-groove edges are used for a subfloor, the mastic is placed in the grooves and on top of the joists.
When panels with tongue-and-groove edges are used for a subfloor, the mastic is placed in the grooves and on top of the joists.