List of available heads

If you require a head – nozzle to be added to enter the pipe in users drop-down box to select the head you require.  Heads which are available on dependent on the project and you can add and amend them in the project data,  head codes tab.

Head area

For sprinkler systems and other types of systems where you're working with a design density it is important to enter the head area otherwise FHC will not be able to calculate the head density for the individual head.

Hydrant flow rate (hose stream)

If you need to specify a hydrant or hose stream allowance and enter the flow requirement in this box. 

Remove Head Code

The 'X' button next to right of the head code will remove any head code selected.

Head density (optional)

For FHC projects where you are have specified a design density in Project Data (Design Area) dialogue as a calculation criteria.  If however you have some heads / nozzles where you require a different design density you may specify it in this Head density text box.

+AF / +AB / +A

You can use the this commands to specifying a pressure and flow requirement the devices such as hydrants, water monitors, hose reels and other devices where you have a flow and pressure demand, you must enter as a minimum flow and pressure (+AF & +AB). The +A command allows you to specify an area and if you do so you will find that the average density is calculated in the head summary report.

You find some further information on the users command in TDS 6 : risers, hydrants and water cannons

FHC - Reference & Tutorial  |  Version 2.4 

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