Elevations Tab Page

On this page the elevations of all the nodes in the GRID are entered. They can be entered by any of three methods – Variable, Sloping or Horizontal (fixed). The elevations are applied to successive rows and different methods can be employed on different rows progressively "up" the GRID. The elevation(s) of the first row must always be entered.

The user first enters the Method of entering elevations. The items of input are then dependent on the method selected:

VARIABLE

Row Number - The row number for which the following elevation(s) apply. The rows are numbered from the bottom of the grid upwards and entered elevations for a row apply to successive rows until the next entered row. E.g. the elevations for row 1 might be entered and then row 4 is entered with a different set of elevations. This means that the elevations for row 1 also apply to rows 2 and 3.

After entering the row number, right clicking the mouse in this field will cause a pop-up form to appear in which the individual elevations of each node across the specified row can be entered sequentially.

On the form the first three items are determined by the program and the only item required to be entered by the user is the elevation. To the right of the table, the sprinklers are displayed graphically together with the main pipes.

SLOPING

Row Number

h1 – height 1 in the units of elevation The elevation of the first node (furtherest to the left) or in the case of sloping elevation, the elevation of the starting node of the first sloping side (left hand side).

h2 – height 2 in the units of elevation The elevation of the point on the pipe at the right end of the first (right hand) sloping side. This is also the starting point of the second sloping side. Note that this point does not have to be a node, it is a point on the pipe.

h3 – height 3 in the units of elevation The elevation of the point on the pipe at the right end of the second (right hand) sloping side. If any additional nodes on the row to the right of the ending point exist, they will have the same h3 elevation.

For a raking roof, (h2-h1)/d1 equals (h3-h2)/d2

d1 – distance d1 in the units of length The length of the left hand sloping side, i.e. the distance along the pipe, not the horizontal distance.

d2 – distance d2 in the units of length The length of the right hand sloping side, i.e. the distance along the pipe, not the horizontal distance.

When sloping is selected a graphic display is also provided, displaying the row of sprinklers where the various sloping values are being applied.

HORIZONTAL - all nodes at the same elevation

Row Number - The row number for which the following elevation(s) apply. The rows are numbered from the bottom of the grid upwards and entered elevations for a row apply to successive rows until the next entered row. E.g. the elevations for row 1 might be entered and then row 4 is entered with a different set of elevations. This means that the elevations for row 1 also apply to rows 2 and 3.

h1 – height 1 - the elevation of all nodes in this row (and subsequent rows until the next row number entered).