In the 2010 ADA Standards the two places which describe how to provide accessible accommodations in transient lodging facilities are Section 224 and Section 806
In Alterations only the altered guest rooms must comply until the minimum number of guest rooms per Table 224.2 is met.
One of the main things that changed is how we determine the minimum number of guest rooms. In the 1991 Guidelines it had a similar table , but it was not clear how many rooms for mobility and how many rooms for communication features were required. The new table gives you the number of required rooms as well as how many should have roll in showers or could have tubs etc.
Guest rooms with Mobility features should compy with Section 806.2 of the Standards.
Guest rooms with Communication features should comply with 224.4
A minimum number of guest rooms with communication features is found on Table 224.4
The number that you get from the mobility table should be also added to the communication table.
For example. If we have 550 Guest rooms. The number of mobility rooms with roll-in showers are 1% of total and the number of rooms without roll-in showers (i.e. transfer showers or tubs) is 2%. So altogether you will need 17 rooms with mobility features (6 of them with roll-in showers).
In addition you will need 5% of the guest rooms with communication features, which is another 28 rooms.
The total number of accessible rooms will be 45. 10% of those rooms may have both mobility and communication features, but the other 90% must be separate rooms.