Upload
vishal-ranganathan
View
29
Download
0
Embed Size (px)
DESCRIPTION
types of wooden joints
Citation preview
TYPES OF WOODEN JOINTS
JOINERY Art of preparing internal fittings and finishing of timber- Process of joining wood pieces together
INTRODUCTION
Permanent construction
Temporary constructionCarp
entr
y
Bead
Chamfering
Groove
Ground
Housing
Mitring & scribing
Moulding
Nosing
Rebating
Sawing
Shooting
Veneering
INTRODUCTIONMaterials used for joinery Glue
Fasteners
Principles governing construction of joints
Surface of joint Even distribution of pressure
Each abutting surface Normal to line of pressure & take
maximum compressive stress
Fasteners proportioned for equal strength in relation to
the members
Fastenings should avoid shear / crushing failure
Joint should be as simple as possible
Cutting & placing of joints make minimum weakness of
members
CLASSIFICATION OF JOINTS
Lengthening joints Employed to extend the length of a member by joining
Widening joints Employed to extend the width of the boards/planks
Angle joints Employed to connect the members at ends or at right angles
Oblique shouldered joints Employed to connect members at an angle
Bearing joints Employed to give sufficient strength at the junction meeting at 90
Framing joints Employed to construct doors, windows, ventilators & partitions
STRENGTH OF TIMBER JOINTS DEPENDS ON
Area of gluing
The way in which one piece of timber encases the other
The finishing work
LENGTHENING JOINTS:
LAPPED JOINT FISHED JOINT
SCARFED JOINT
WIDENING JOINTS:
BUTT JOINT DOWELLED JOINT
TONGUE & GROOVE JOINTREBATED JOINT
ANGLE JOINTS:
Plain RebateMitre & Rebate Dovetail
Tongue & Groove
OBLIQUE-SHOULDERED JOINT
Mortise & Tenon Bridle Joint
Dovetailed joint Birdsmouth joint
BEARING JOINT
Chase-mortise joint
Cogged joint
Double tenon joint
Dovetail joint
Halved joint
Housed joint
Joggle tenon joint
Mortise & tenon joint
Notched joint
Tusk tenon joint
Q & A