CARPENTRYPresented by: Nicolas O.

GeotinaPolytechnic University of the Philippines

CARPENTRY?

CARPENTRYIs the art of combining

pieces of lumber to support weight or to resist pressure.

LumberTimber sawed

into boards, planks, or other structural members of standard or specified length.

TimberThe wood of trees

cut and prepared for use as building material.

MEASURING WOODS:Board Foot means one square foot of wood

of one inch thick. The formula used to find board foot is:𝑩𝑶𝑨𝑹𝑫 𝑭𝑶𝑶𝑻= 𝒕𝒉𝒊𝒄𝒌𝒏𝒆𝒔𝒔 𝒙 𝒘𝒊𝒅𝒕𝒉 𝒙 𝒍𝒆𝒏𝒈𝒕𝒉𝟏𝟐

Example: Compute the number of board feet for a piece of lumber measuring 2”x6”x12’Solution: board feet

Example: How many board feet are there in 30 pcs. Of lumber measuring 2”x8”x14’Solution: board feet

GUIDES ON MEASURING LUMBER

1.The thickness and width of lumber is in inches while the length is in feet of even length.

2.Lumber of nominal sizes from 2” x 2” and lower, are no longer computed in board foot, but in linear foot.

3.The price of lumber is variable depending upon:

a. Length. b. Width. c. Kind of lumber.

TOOLS USED IN CARPENTRY:Common:A. Testing Tools

1. Square2. Level3. Bevel4. Plumb Bob

B. Marking Tools1. Lead

Pencil/Chalk2. Scriber3. Compass

C. Holding Tools1. Clamp

D. Cutting Tools1. Saws2. Chisel

E. Smooth Facing Tools1. Plane

F. Boring Tools1. Twist Drill

G. Fastening Tools1. Hammer2. Wrench3. Screw Driver

Square LevelBevel

Scriber Lead

Compass

ClampsSaws

Files & Rasps

Chisel

Planes

Twist Drills

ScrewWrench

Hammer

JOINTSThe union of two or more smooth or even

surfaces admitting two or more pieces of lumber to a closed fitting or junction.

Joinery – is the art of joint making

Mortise Joint – Mortise is defined as a space in lumber joint hollowed out to receive a tenon or the like.

Tenon Joint – is a projection to be inserted into a socket or mortise in another lumber to make joint.

Dovetail Joint – is defined as partially housed tapered mortise and tenon joint. The word dovetail is used figuratively.

MORTISE

TENON

DOVETAIL