Recommended minimum vertical curve radii are shown in Table 6. Shorter radii may be used in unusual cases if chain pull is light and carrier clearance permits.

Make two " Elevation" templates or carrier and part, and move properly spaced templates over scaled drawing of path of vertical curve. Check that carriers and parts clear each other and also clear the chain. (Note that carrier spacing must be a multiple of twice the chain pitch.) Determine tentative trolley spacing.

Selection of a standard radius for all horizontal turns simplifies installation, reduces parts inventory, facilitates future conveyor rearrangements and makes all turn components interchangeable.

Avoid extremely short radius turns. Table 7 gives recommended minimum radii for chosen conveyor chains.

A length of straight rail must always be provided between the tangent point of a horizontal turn and the tangent point of a vertical curve. On conveyors with the load suspended from one two-wheel trolley, this length should not be less than the longest trolley space. On conveyors with load suspended from two points, the length of straight rail should not be less than the distance between these two points.

Make two "Plan" templates of carrier and part, move properly spaced templates over scale drawing of path of horizontal turn. See that carriers clear each other.

Use these templates layouts to determine clearance for guards.

The clearances required between parts of carriers will often determine the minimum horizontal turn radius, minimum radius of vertical curves, and the angle of incline and decline of sloping tracks.