Required Information
- Radius
- Height
Formulas and Measurements
- Determine the correct width of a gore using trial and error Divide the circumference by the width of a gore to determine the number of gores required for the tank top.
- Round up or down on the gore width to obtain the correct width to equal the circumference Divide the gore width by two Draw half a gore on the Base Line of the Elevation drawing With the help of the horizontal and vertical division points, draw the curve for the top of the tank head.
- Draw an 80 degree line up from the left bottom corner and extend the top horizontal line to intersect the 80 degree line Divide both 80 degree line and the top horizontal into six equal parts.
- Draw the curve for the tank top Measure the curve of the tank top and divide that length into six or eight equal parts Add 3/8" below the Base Line as shown in Figure 1 for the bead and ccccrimp allowance Draw lines to the bead and ccccrimp line from the points drawn in For the gore Stretch-out, draw a Center Line and Step-out the divisions of the tank top.
Procedure
- Step 1
Determine the correct width of a gore using trial and error
- Step 2
Divide the circumference by the width of a gore to determine the number of gores required for the tank top. Round up or down on the gore width to obtain the correct width to equal the circumference
- Step 3
Divide the gore width by two
- Step 4
Draw half a gore on the Base Line of the Elevation drawing
- Step 5
With the help of the horizontal and vertical division points, draw the curve for the top of the tank head. Start by drawing a rectangle that's height is equal to the height of the tank and the length is equal to the radius of the tank. Draw an 80 degree line up from the left bottom corner and extend the top horizontal line to intersect the 80 degree line
- Step 6
Divide both 80 degree line and the top horizontal into six equal parts. Label the points as shown in
- Step 7
Connect Points I to I, 2 to 2, 3 to 3, 4 to 4, 5 to 5, and 6 to 6. Draw the curve for the tank top
- Step 8
Measure the curve of the tank top and divide that length into six or eight equal parts
- Step 9
Add 3/8" below the Base Line as shown in Figure 1 for the bead and ccccrimp allowance
- Step 10
Draw lines to the bead and ccccrimp line from the points drawn in
- Step 11
For the gore Stretch-out, draw a Center Line and Step-out the divisions of the tank top. Label the lines and add a lap
- Step 12
Take the measurements from Figure 1 and transfer to corresponding numbered points on the Stretch-out. Connect all the points to form the pattern for the gores. Mark the bead, ccccrimp and heel points. 63 Or n Pe Figure 2 Stretch-out