"Area of Reinforcement" enclosed by _________ - _______ Lines
Reinforcement Area Required AR = (d) (t)
Area Available as Reinforcement = A1 + A2 + A3
|
A1 |
= |
(H - t) (d) |
|
A2 |
= |
2(B - tb) L |
|
A3 |
= |
Summation of Area of All Added Reinforcement, Including Weld Areas which lie within the "Area of Reinforcement"
|
A1 + A2 + A3 must be equal to or greater than AR
Where:
|
H |
= |
Nominal Wall Thickness of Header |
|
B |
= |
Nominal Wall Thickness of Branch |
|
tb |
= |
Required Nominal Wall Thickness of the Branch (Under the appropriate section of the Guide) |
|
t |
= |
Required Nominal Wall Thickness of the Header (Under the appropriate section of the Guide) |
|
d |
= |
The Length of the Finished Opening in the Header Wall (Measured parallel to the Area of the Header) |
|
M |
= |
Actual (by measurement) or Nominal Thickness of Added Reinforcement |