Access Points

We agreed last week to make the walk accessible by lift only i.e. no stairs because of the shortage of ground level space.  Having given this further thought I think that using lifts as the sole means of access will create a major capacity issue.  I suggest we have lifts primarily for people with disabilities, parents with pushchairs and cyclists etc.  but the main access for the able bodied should be by spiral staircase - see images below.  Suggest an assumption of 2m wide treads and an overall staircase diameter of 5.5m.