# How to Calculate and Solve for Rated Static Head (in Top Gating) | Design of Gating System

The image represents rated static head (in top gating).

To compute for rated static head (int top gating), one essential parameter is needed and the parameter is Height of the Sprue from its Top to the Point of Metal Entry into the Mould Cavity (H).

The formula for calculating rated static head (in top gating).

Hs = H

Where:

Hs = Rated Static Head (in top Gating)
H = Height of the Sprue from its Top to the Point of Metal Entry into the Mould Cavity

Let’s solve an example;
Find the rated static head (in top gating) when the height of the sprue from its top to the point of metal entry into the mould cavity is 10.

This implies that;

H = Height of the Sprue from its Top to the Point of Metal Entry into the Mould Cavity = 10

Hs = H
Hs = 10

Therefore, the rated static head (in top gating) is 10.

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the rated static head (in top gating).

To get the answer and workings of the rated static head (in top gating) using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

To get access to the professional version via web, you need to register and subscribe for NGN 1,500 per annum to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator

Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Materials & Metallurgical under Engineering.

Now, Click on Foundry Technology under Material & Metallurgical

Now, Click on Design of Gating System under Foundry Technology

Now, Click on Rated Static Head (in Top Gating) under Design of Gating System

The screenshot below displays the page or activity to enter your value, to get the answer for the rated static head (in top gating) according to the respective parameter which is the Height of the Sprue from its Top to the Point of Metal Entry into the Mould Cavity (H).

Now, enter the value appropriately and accordingly for the parameter as required by the Height of the Sprue from its Top to the Point of Metal Entry into the Mould Cavity (H) is 10.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the rated static head (in top gating) and presents the formula, workings and steps too.