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Wood Products Utilization & Lumbering - Coggle Diagram
Wood Products Utilization & Lumbering
terms
sfm
largest sustained mitigation benefit
green economy
FPU
goods obtained in forest
collect, harvest
Forest Products
Timber forest products
derived from main stem or trunk
Lumber Manufacture
lumber
product sawn from a log
sawmilling
conversion of log to lumber
steps
debarking 1
removal of bark
avoid damage to equipments
bark has diff chem composition
higher amt of lignin & extractives
headsawing 2
conversion of log into larger pieces of lumber
plants, boards or dimensions
methods
w/ respect to end grain orientation
plain sawing
tangential grain
parabolaic or triangular - grains
head sawing
radial grain
w/ respect to outer axis
taper sawing
non taper sawing
types of headsaw
bandsaw
endless serrated steel ribbon stretched between 2 pulleys
circular saw
large dia
can only cut less than its dia
gang saw
multiple blades mounted on a frame or a sash
1 more item...
sawing patterns
live sawing
cutting thru & thru
1 more item...
resawing 3
reduce large size into smaller pieces of lumber
recover usable lumber from slabs
slab = wood near the bark
edgine 4
cut parallel to grain
aka ripping
cut boards w/ parallel & square sides
standardize widths
trimming 5
aka cross-cutting
cut perpendicular to the grain/ cut accross the length of lumber
cut boards w/ parallel & square ends
standardize length
2-5 = basic processes
secondary operations
piling 1
arranging lumber for storage/drying
grading/sorting 2
grading
classification based on existing standards
nhla classification
national hardwood lumber
planing/surfacing & shaping 3
create accurate dimensions
preservative treatment 4
seasoning 5
removal of moisture
end coating 6
painting lumber ends w/ aluminum or water resistant paint
prevent moisture changes
done for kiln dried lumber
area requirement
area needed by company to sustain its operation
lumber measurement
board foot
1 in by 1 ft by 1ft
board meter
1 cm x 1m x 1m
thickness
inches
length
feet
width
inches
volume
board foot
twl / 12
type of lumber
rough lumber
gone thru basic operations
dressed lumber
gone thru planing
peripheral milling
waste material called chips
bucking
cut across the length
NTFPs
derived from trees other than timber
bark, root, leaves, fruits
other lumber
glulam
union of individual wood segments
glue laminated wood
joined via f2f, edge to edge
lumber impregnated w/ resin
impreg
compreg
impreg plus compression
veneer & PLYwood manufacture
veneer
thin sheet of wood of uniform thickness
used in plywood
plywood
assembly of odd layers of veneers
grain direction of adjacent plies @ right angles to another
terms
bucking
cut acrosss the length
flitch prep
sawing in half or quarter
steaming/boiling
softening of bolts
veneer cutting
pit sawing
cold pressing/pre-pressing
temporary adhesion to facilitate handling
75 - 80% pressure
wood composition board manufacture
wood product in form of board or sheet
cellulose fibers/ particles
building material
differentces
mdf
ligno cellulostic material
fiber form
adhesion of resin or glue
osb
lignocellulostic material
discrete shape & sizes
adhesion of thermoplastic char of lignin
particle board
from discrete wood particles of various sized
adhesive - bond w/ synthetic adhesive
controlled heat & pressure
fiber board
from fiber or pulp
same material used in paper manufacture
classifcation
insulation
mdf
hardboard
pulp & paper manufacture
paper
egyptian word papyrus
reed that grows on the bank of Nile River
all kinds of matter or felted sheet of fiber
pulp
fibers from ligno cellulostic materials
paper making process
foudrinier machine
thinner, faster
cylinder
thicker, slower prod