Basuc Joint Desgins

Question 1

5 basic joint designs

Answer 1

Lap, edge, tee, corner, butt

Question 2

How big of an overlap do you need on a lap joint to get maximum tensile strength?

Answer 2

5 times the thickness of the thinner member

Question 3

Types of edge preparations used on a tee joint.
Types of edge preparations used on a corner joint.
Types of edge preparations used on a edge joint.
Types of edge preparations used on a butt joint.

Answer 3

Tee joint - single and double bevel, single and double J

Corner joint- single and double bevel, single V, single and double J and Single U

Edge joint- Single bevel, single V, Single J and Single U

Butt joint- square (used on materialno thicker than 1/4in), single and double bevel, single and double J, Single and double U and single V (used on material 1/4in to 3/4in) and double V (used on steel plate (3/4in or more thick)

Question 4

If two members of a butt joint are of different thicknesses, the end of the thicker section must be sloped to meet the thinner, at a slope of not kire than ___________. The CSA and AWS guidelines call this a “________”

Answer 4

“1 in 2.5” “4 in 10(4:10) slope”

Question 5

5 main types of welding are

Answer 5

Surface weld
Tack weld
Fillet weld
Groove weld
Plug and Slot weld

Question 6

Describe the various aspects of a fillet weld

Answer 6

Leg, Face, Toe, Throat, Root and Root penetration

Question 7

How do you find the effective throat? How do you find the maximum convexity?

Answer 7

Length of shortest leg by .707

0.07× face width + 1.5mm (1/16)