Transcript FASTENERS - Bertauski

FASTENERS
Screws, 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.
NAILS
Avoid splitting wood
• Using pilot holes
• Flat side with the
grain
NAILS
Avoid splitting wood
• Stagger nails
NAILS
Avoid 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 TYPES
Wood Screws
• Standard
• Phillips
• Square drive
• Star (torx) drive
Screws
• Phillips/Square/Slotted combo head
SCREWS TYPES
Sheet metal screws
• Tip acts like a drill bit
SCREWS TYPES
Lag 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=_U1Hwg
ttA5Y&index=7&list=PLA1B52C642BD821
67
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
JOINING MATERIALS
• 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
• 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