@andrew: Please reread & TRY to understand what was provided in my post. my first point was SIMPLY to clarify what a "working aisle " is and what it is not. Didn't see a clarification in your post. Some people may not know how to determine it, especially the less experienced folks.
Secondly, why it is a REALLY good idea to add an extra 4" to 8" to the calculated right angle stack capability of the machine to avoid a very costly situation down the road (i.e. having to move racks). I SIMPLY was stating some of those contributing factors which can affect actual "real world"right angle stack performance capability - which ONLY ONE was tires. This can be likened to the advertised mpg of a vehicle vs what you actually get. Oh by the way most reach unit the drive tires can have , either a rubber type compound , some even impregnated with walnut shells (freezers) or polyurethane - these tires have all a different durometer ratings and will perform differently due to the difference in rolling resistance. Your tire supplier can provide that data the durometer ratings they are just a cell phone call away.
Note: It is always better to be over informed than under informed. Being under informed is similar to doing battle with a six shot revolver loaded with only one bullet.
If this info was too much for you to digest you had four choices 1. Don't read it 2. Ask questions to try to get a better understanding and be better informed to help your customers 3. Ask the FAC ADMIN to remove my post 4. Or provide a less than professional response - which is the option you chose.
Your 2 x 4 maybe be a good suggestion but it ASSUMES that the customer has a narrow aisle truck and racks have not been set. How would one determine aisle size when planning a rack system work aisle based on
pantograph reach (most common in the USA & Canada & very little in Mexico and almost non-existent in Europe - the ylike mast reach units) layout for a new installation or conversion from a typical counterbalance work aisle of 12' aisle (in the US) and possibly larger in other parts of the world as they use very little press-on solid tire units - primarily use pneumatic tire (tyre) units. The originator of this thread is not from the States and is looking for info on a Crown pantograph unit that is not very common in the UK and demo or rental units might be hard to provide and I AM ASSUMING they are doing paper study at this point and he just wants specs on machine capability to see how many more pallet slots they can add. I believe to answer his questions one would need to contact Crown but more information would be required by Crown, items such as - pallet sizes & design (GMA styles pallets aren't common in ), the EURO pallets are much different than in the US, load centers are based on 500 mm (~20") vs 610 mm ("24" in the US, will the bottom row of pallets be set on the ground or positioned on beams above the floor, mast lift height, attachment - like side shift, etc, etc which Crown & Raymond typically require before providing any work aisle requirements.