The description for the Floating Disc spell in Labyrinth Lord goes a little like this:
The caster creates a slightly concave, circular plane of force
that follows him about and carries loads. The disk is 3 feet in
diameter and 1 inch deep at its center. It can hold 500
pounds. If used to transport a liquid, its capacity is 2 gallons.
The disk floats approximately 3 feet above the ground at all
times and remains level. It floats along horizontally within spell
range and will accompany the caster with an equal movement
rate. If not otherwise directed, it maintains a constant interval
of 6 feet between itself and the caster, and will follow the
caster without prompting to maintain a minimum of 6'
What a terrific spell. If only it scaled beyond its simple first level abilities, they'd perhaps be no need for the levitation spell and possibly the flight spell also. If somehow the distance to the caster could be variable, it could be used to do all sorts of things, such as to create a stepping stone across a chasm or a river. Perhaps it could be even be used, as is, to hold a door shut like the hold portal spell, as 500 pounds of force is quite a lot to bring to bear to shift the thing.