If a tolerance of form, orientation or position is specified for a feature, the dimension determining the
theoretically exact form, orientation or position respectively must not be toleranced. The corresponding
actual
dimensions
may
only
vary
by
the tolerances
of
form,
orientation
or
position
specified
within
the tolerance
frame.
SS-ISO 1101 specifies that dimensions determining the theoretical profile, surface, angle or position
shall be framed. At Volvo the general practice shall be to frame these dimensions only when there is
risk of interpreting them as dimensions to which a general tolerance on the drawing applies. In such a
case, the dimensions shall be framed by rectangles as shown in figures 59 and 60.