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8
Measuring the
Door Opening
For the width (W), measure the
dimension between the right and left
exterior trim or door frame at both
the top and bottom of the doorway as
indicated in the diagram. Record the
smallest of the two sizes in the box
labeled "Width" below.
For the height (H), measure the
inside dimension between the top
exterior trim or door frame and the
door sill at the lowest point in its slope.
Measure in all three locations as
indicated in the diagram and record the
smallest dimension in the box labeled
"Height" below.
Finally, measure the height of the
lowest at portion of the exterior
trim or door frame (T). This must
be a minimum of 5/8" (16 mm),
and must be completely at and
square.
Top Trim Mounting Surface
Width
(W)
Height
(H)
T
T