IKEA SKYTTA Installation Manual page 6

Marking key measurements
Mark with a line all around the opening where you are going
to place the system. Mark the front of the system as in the
illustration to the right. For accuracy, we recommend using a
crosshair laser level for marking these measurements.
Note! From the front of the storage solution to the front of
the track/rails, you need 10 cm (37/8") for a 2-track solution
and 14 cm (51/2") for a 3-track solution.
Check if the floor and/or walls are uneven and need to be
adjusted. Measure the width (X1, X2, X3) after adjustment.
X1 and X3 will be the same if the stop bar isn't used.
Measure the height (Y1, Y2, Y3) after adjustment.
_____________ cm
6
X1 X1
_____________ cm _____________ mm
X1 Y1
X3 X3
_____________ cm _____________ mm
Y2 X1
_____________ cm
X2
_____________ cm
X1 Y3
_____________ cm