Wood Flashcards
When specifying a rot resistant wood, what exact specification do you have to write to get the rot resistance?
The Heartwood
Which grows faster, springwood or summerwood?
Springwood
Which is stronger, springwood or summerwood?
Summerwood
What type of wood is typically used for trim?
Hardwood
What type of trees produce ‘hardwood’?
Broadleaf trees - deciduous trees
What type of trees produce ‘softwood’?
Pine trees, evergreen and conifer trees
Which of the following has a higher structural quality?
MC15 or MC19
MC15
What does MC15 and MC19 mean?
Moisture Content
15 = 15%
19 = 19%
Less moisture = stronger tree
What’s the formula for the moisture content?
((Wwet - Wdry) / Wdry) * 100
What is the process by which the bound water in the cells is released?
Seasoning
How does wood shrink?
Tangentially to the grain
What is the most expensive type of wood per board foot?
Glulam
What type of engineered wood can make a large and strong panel?
CLT - cross laminated timber
Which has longer strands and which has shorter strands:
- LSL (Laminated Strand Lumber)
- OSL (Oriented Strand Lumber)
Longer = LSL
Shorter = OSL
What makes Parallel Strand Lumber strong?
The strips being laid in the same direction
What is the calculation to determine ‘board feet’?
Nominal Dim W x Nominal Dim D x Length / 12
Rank the following from largest strands to smallest strands:
- Particle Board
- Fiber Board
- Oriented Strand Board
Largest - OSB
Middle - Particle
Smallest - Fiber
What type of non-veneer panel is MDF?
Fiberboard
A wood panel has a rating of 32/16. What does this mean?
It can span 32” as a roof board and 16” as a floor board
What are the 2 types of wood treatment that has been phased out for being toxic?
Creosote and CCA (Chromated Copper Arsenic)
What type of wood treatment is used on telephone poles?
Pentachlorophenol
Remember ‘Penta’
What type of treatment should be used for above ground, ground contact and/or freshwater immersion?
ACQ and CBA
Alkaline Copper Quaternary
Copper Boron Azole
THINK COPPER
What types of fasteners should NEVER be used with ACQ and CBA treatment?
Steel or aluminum fasteners due to galvanic action.
What types of fasteners are allowed to be used with ACQ and CBA treatment?
Stainless steel, zinc galvanized and copper alloy
What types of treatments should be used for termite protection?
Borons
SBX - Sodium Borate
DOT - Disodium Octoborate Tetrahydrate
Which wood treatment can be painted, be below ground and be installed with steel fastners?
Carbon Based PTI and Micronized Copper
Which are the most toxic wood treatments?
Creosote and CCA
Which is limited to above ground use?
SBX and DOT
Which is most corrosive to steel fasteners?
ACQ, CBA and CCA
Which can’t be painted?
Creosote and Penta…..
Which woods are naturally termite resistant?
Eastern Red Cedar and Redwood
What type of nails have a flat head?
Common Nail
Brad
Finish Nail
Sinker Nail
Casing Nail
Box Nail
Hardened Concrete Nail
Roof Nail
Common Nail - because its common
Box Nail - why have round on a box
Sinker Nail - flush install, no filling
Roofing Nail - we don’t want VALLEYS on our roof do we?
What type of nails have a tiny head?
Common Nail
Brad
Finish Nail
Sinker Nail
Casing Nail
Box Nail
Hardened Concrete Nail
Roof Nail
Brad - so does he
Finish Nail - to fill with the smallest size
Casing Nail - see above
What is the stronger nail connection?
Face nail
What is the difference between a carriage bolt and a machine bolt?
Machine bolts need wrenches on both sides.
Carriage bolts catch on the wood so a wrench is only required on one side
In which scenario is fire stopping required?
Balloon Framing or Platform Framing?
Balloon Framing
