Log Sawing

Question 1

The act of cutting down a living tree

Answer 1

Felling

Question 2

Once the tree has been felled, its branches will be removed, leaving the trunk (stem) in the form of ?

Answer 2

Log

Question 3

often used very loosely to describe timber, when it should be used to describe either a collection of growing trees or the substance that trees are made of, i.e. the moisture-conducting cells and tissues etc.

Answer 3

Wood

Question 4

wood in the form of squared boards or planks etc.

Answer 4

Timber

Question 5

The division of this log into timber sections

Answer 5

Conversion

Question 6

Conversion process in which natural forests of hardwood and
some softwoods, selective felling may be
employed by taking out specific trees.

Answer 6

Tree selection or Forest Clearance

Question 7

Conversion process in which the simplest and most effective route
will be chosen. This may be via road, rail,
or water; it will depend on the forest
location and accessibility to the various
means of transportation.

Answer 7

Transportation to Sawmill

Question 8

Conversion process where possible,
mill ponds are used
to keep the logs
wet.

Answer 8

Mill storage

Question 9

Conversion process in which Logs will be lifted into bays according
to girth size (circumference) and usually
species.

Answer 9

Log selection

Question 10

Conversion process in which each logs must be scanned with a
metal detector before it enters the saw
mill to protect saw teeth from any foreign
elements

Answer 10

Log scanning

Question 11

Conversion process in which softwoods and some hardwoods will
pass trough a ______ process before
entering the mill

Answer 11

Debarking

Question 12

the bark residue may be

used as?

Answer 12

fuel or for horticultural purposes.

Question 13

Stage of conversion process in which

transforms the log into timber.

Answer 13

Log division

Question 14

saw that are generally capable of
cutting hardwood and softwood logs of
small to medium diameter – blades could
be as large as 1.8 m in diameter.

Answer 14

Circular Saw

Question 15

used for cutting all
sizes of hardwood and softwood logs. The
blade is a wide endless steel band
revolving around two large wheels (pulley).

Answer 15

Vertical Bandmill

Question 16

bandmills that may be employed to
make two cuts in one pass; this is
achieved by positioning the machines
either in line, or parallel one to another

Answer 16

Double Bandmill

Question 17

bandmills that are used for cutting
all sizes of hardwood and softwood. In this
case horizontal cuts are made.

Answer 17

Horizontal bandmil

Question 18

used
for cutting small to medium diameter
softwood logs. The logs are cut by being
pushed towards a
series of
reciprocating
(upward and
downward
movement) saw
blades.

Answer 18

Verical saw or Gang saw

Question 19

Different factor for log conversion

Answer 19

 Type of sawing machine
 Size of log (diameter or girth)
 Condition of the log
 Wood species
 Economy
 End use of the resulting timber – for its
appearance, decorative or structural
requirements

Question 20

In this method of conversion, parallel
cuts are made down the length of the log,
producing a number of ‘quarter’ and
‘tangential’ sawn boards.

Answer 20

Through-and-through-sawn

Question 21

In through-and through sawn method the first and last

cuts leave a portion of wood called

Answer 21

Slab

Question 22

It shows that by starting with a
squared log, \_\_\_\_\_ boards are
produced by working round the log, by
turning it to produce boards, all of which
(except the centre) have their growth
rings across the boards’ width.

Answer 22

Tangetial-sawn (plain sawn)

Question 23

This method of conversion can be
wasteful and expensive, although it is
necessary where a large number of radial
or near radial-sawn boards are required.

Answer 23

Quarter (Radial) or rift sawn

Question 24

2 Resulting Timber Section (with the
exception of that which surrounds the
pith – the ‘heart’)

Answer 24

1. Plain or tangential sawn

2. Quarter or rift sawn