Post on 15-Jan-2016
DECKS
Square Corner
• Framing square
Square Corner
• 3-4-5 triangle
Square Corner
• Diagonals
LEVEL
• Water level• https://www.youtube.com/watch
?v=U-r12l904ow
LEVEL
• String level
LEVEL
• Builder’s level
POSTS
Concrete footings Provide Structural support but NOT lateral
• Pier blocks
POSTS
Pier blocks (continued)
POSTS
Concrete footings Provide Structural support but NOT lateral
• Galvanized post anchor
POSTS
Galvanized post anchor (continued)
https://www.youtube.com/watch?v=MCa_87Dkw1M
POSTS
Galvanized post anchor (continued)
How not to…
POSTS
Direct burial Provide Structural and lateral
support• Footing at bottom of hole
– Blocks or Concrete
POSTS
Direct burial Provide Structural and lateral
support• Backfill around post
– soil or crushed aggregate– dry concrete– wet concrete (must brace post until
set)– https://www.youtube.com/watch?v=pI-
pCSxD0GY
POSTS
POSTS
POST AND BEAM DECK
LedgerAttachment to
existing building
POST AND BEAM DECK
Ledger• Use 3” lag screws to anchor
into rim joist• Expansion bolt if concrete slab
foundation
POST AND BEAM DECK
LedgerAttach directly
to rim joist of house
POST AND BEAM DECK
POST AND BEAM DECK
POST AND BEAM DECK
POST AND BEAM DECK
Beam– Grab beam– Cap beam
• Beam supports joists• Level with bottom of ledger
POST AND BEAM DECK
POST AND BEAM DECK
Joists• Joists support deck boards• Joist hangers attach to ledger• Anchor joists to beam with
rafter ties
POST AND BEAM DECK
Joists• Splice long joist over beam
– Overlap – Gusset
PLATFORM FRAMED DECKConstructing freestanding deck
PLATFORM FRAMED DECKLocate posts with batter boards
and string
PLATFORM FRAMED DECKInstall outside (rim) joists to form
box using ½” bolts• Rim joists act as the beam,
holding joists on hangers
PLATFORM FRAMED DECKInstall interior joists
BLOCKING
• For additional support• Blocking: short blocks of wood
between joists
DECK BOARDS
• 2 x 4, 2 x 6, or 5/4 boards• Installed at angle to joists
– 90 degree or 45 degree
DECK BOARDS
DECK BOARDS
Orientation of grain with bark side up
DECK BOARDS
Space using a nail or pencil?
RAILING
Extend posts
RAILING
Bolt to rim joist
Deck Construction
• Estimating deck construction– $20 to $24 / square foot