My sailing club is short of dinghy parking space and is exploring the option of Laser storage (including launch trolley) on a double deck racking system.
I'm sure we are not the first club to do this so if there are lessons learned or even dimensions available that would be very useful.
There are racks like you want at Torquay harbour, RTYC and at Paignton SC. They are used for a variety of boats. They are made from the keyclamp system.
I'm going to make similar. We also have an over abundance of Lasers.