Chest reach distance

[DrEngine]

What is the distance of chest I can reach by hand ?

[Stroam]

My grinder has a chest on top, below it is hoppers a hopper, then a grinder, then more hoppers. I reach it using a halfslab under the bottom hopper so about three blocks.

[Robert Johnson]

I have an underground room dug in my base (under one of the stadium/arena prefab ruins) that is six blocks high from floor to ceiling. I can stack chests up six high and still BARELY reach the top one, so I would say that six is the max if you are talking about stacking them on top of each other. It's also rather impossible to read anything you might write on a sign on those top ones either unless you back up a few blocks, but that's irrelevant as far as reach goes.

Horizontal reach I haven't experimented with yet.

[DrEngine]

I've tested this and my final design involves room 9x9, height 7 with chests over all walls. Chests in the corners are 1 block sticked out from wall. There in the centre of room is elevated floor (1 block). I can reach all chests.