The referenced code is not the IBC, rather the ANSI standard. From the commentary to the 2017 ANSI standard. (sections were changed in this edition)
1102.15.2 Bed frames. At least one bed shall be provided with an open bed frame.
The open bed frame is intended to allow the use of a
bed lift such as a Hoyer lift to be used to transfer
either to or from the bed. If the bed is installed on a
solid platform, as is common at many hotels, the platform
does not allow for the supports of the lifts to
move under the bed. Having an open bed frame
allows the legs of the lift to extend under the bed and
provides a greater base of support for the lift so that it
is stable and secure during the transfer. Although the
language of Section 1102.15.2 could be viewed as
meaning that any one bed within the unit could have
the open frame, the language of Section 1102.15
should be used so that the bed with the open frame is
also the bed served by the clear floor space. This is a
reasonable interpretation since it will allow the person
to maneuver adjacent to the bed before using the lift
or allow an assistant to maneuver the lift into the clear
floor space before transferring the person back to the
bed. (See Commentary Figures C1102.15.1 and
C1102.15.2).