To Calculate Maximum Load Weight
- Calculate the area of your hearth plate. Example: In an e28T-3 there are two 25.5" diameter half hearth plates. The total area is Pie*Radius Squared. The radius is 25.5/2 = 12.75". 12.75 X 12.75 = 162.56. Multiply by 3.14. 162.56 X 3.14 = 510 square inches. Divide by 144 to get square feet. 510 / 144 = 3.54 square feet.
- For Easy-Fire, Jupiter, eQuad-Pro, JH Series, eFL Series, School-Master, Doll KIlns: Figure 100 pounds per square foot. In the example above then the maximum weight that can be put on the hearth (assuming even loading) is 100 X 3.54 = 354 pounds.
- For DaVinci Kilns: Figure 150 pounds per square foot.
- For Easy-Load Kilns: Figure 200 pounds per square foot.
- If you need the weight in KG multiply the number of pounds times 0.453592
Even Loading
The other factor is that the brick is mostly non-compressible as long as the load is spread out evenly. For heavy loads we recommend putting a hearth plate right on the bottom of the kiln on top of the firebrick to spread out any weight. If you put all of a very heavy load on a few kiln posts then you could compress the brick and damage the bottom.
