FASTENERS Screws, Nails, Bolts…. SCREWS AND NAILS Must resist corrosion Rusting fasteners retain...
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Transcript of FASTENERS Screws, Nails, Bolts…. SCREWS AND NAILS Must resist corrosion Rusting fasteners retain...
FASTENERSScrews, Nails, Bolts…
SCREWS AND NAILS• Must resist corrosion
• Rusting fasteners retain moisture• Rot• Bleed
SCREWS AND NAILS• Galvanized coating
• Specify “hot-dipped”• Avoid electro-galvanized (bright)
• Stainless steel
• Polymer-coated
NAILS• Hardened piece of wire
• Nail length is given in “Penny Weight” (d)• 10d nail is about 3” long
PENNYWEIGHT?The term penny originated in England
many years ago. Ten penny, four penny, etc., nails got their names from the fact that one hundred nails of that size cost ten pence, four pence, etc. Today penny represents the definite length of a nail measured from the head to the tip of the point. The term penny is still shown by using the English Pence sign d.
NAILSAvoid splitting wood
• Using pilot holes
• Flat side with the grain
NAILSAvoid splitting wood
• Stagger nails
NAILSAvoid splitting wood
• Blunt tips
NAILS TYPES• Smooth shank
• Ring shank
• Spiral shank
• Truss nail
• Duplex nail (temporary)
NAILS TYPES
SCREWS• Greater resistance to withdrawal than nails
• Specify size by diameter and length• ¼” x 3”• ½” x 6”
PILOT HOLE for SCREWS• Pilot hole should be smaller than screw
• Thread bites into wood
• Size of shank
SCREWS TYPESWood Screws
• Standard
• Phillips
• Square drive
• Star (torx) drive
Screws• Phillips/Square/Slotted combo head
SCREWS TYPESSheet metal screws
• Tip acts like a drill bit
SCREWS TYPESLag Screws
• Heavy duty screw used when bolts cannot
• 2 to 8” long
Lag Screws Installation• Drill about half the length of lag screw
• Hammer to bottom of pilot hole
• Thread the rest of way
• LedgerLOK screws
https://www.youtube.com/watch?v=_U1HwgttA5Y&index=7&list=PLA1B52C642BD82167
BOLTS• Better shear strength than nails and screws• Used in major structural joints• Size: diameter and length• Sizing length: 1” greater than the adjoining
boards
PILOT HOLE for BOLTS• Pilot hole same size as bolt
• Thread bite not required
• Washers and nut required to fasten
BOLT TYPES
Standard Bolt• Hex or square head
BOLT TYPES
Carriage bolt• Round head with square base for better look and
feel• Tighten until square base crunches in
• ThruLOK bolts• http://www.youtube.com/watch?v=ApIDd39L
UGc
BOLT TYPES
Expanding or wedge bolt• Attaching to concrete or brick• Flange fits into pre-drilled hole
Wedge Bolt Installation• Drill depth of bolt with concrete bit
• Hammer bolt to bottom of pilot hole• Avoid flattening threads
• Tighten nut and washer
IPE Clips
IPE Clips• https://www.youtube.com/watch?v=vJsfpp
0gt8M
JOINING MATERIALS
Direct nailing: 1” from end and side
JOINING MATERIALS
• Toenailing: 45-degree through end of board
JOINING MATERIALS
• Butt joint: two boards simply butted together
• Miter cut: angle cut across width• Miter joint: 90-degree corner
JOINING MATERIALS
• Bevel cut: angle cut along thickness
JOINING MATERIALS
• Cross cut: cutting across the grain
at 90-degree
JOINING MATERIALS
• Rip cut: cutting with the grain
JOINING MATERIALS
• Table saw for rip cuts• Table saw sensor• https://www.youtube.com/watch?v=No_h6iVI
FgA
JOINING MATERIALS
• Splicing: overlap or gusset over beam
CONNECTORS
Joist hanger: connecting joist to ledger
CONNECTORS
• Post saddle: fastening beam to top of post
CONNECTORS
• Angle bracket: support under wood (steps)
CONNECTORS
Rafter ties: connect joist to beam