I'm the proud owner of a nifty Haulmark 6x10 enclosed trailer that I'm going
to use for some wide range of things, most of which I don't know about yet.
I can come up with a lot of good ideas, but they're pretty worthless if I
can get advice from someone who's been through it already.

Question is, how do I outfit it to give me versatility in tying stuff (some
of it maybe heavy) down securely and not get in the way of bulk moving?

As delivered, it has a standard steel frame, channels 24" o.c. in the floor
with a PT 3/4" plywood floor. It has a heavy D-ring, bolted through to a
steel plate, in each corner.

I'm tending toward the idea of bolting down a pair of long runners (2x4?
4x4?) on the floor, maybe 4 feet apart and one cross piece at the nose. Then
I could just load in 4x8 sheets of anything without worrying about them
shifting. The runners maybe would be useful for skidding, rolling heavy
pallets around without wrecking the floor.

How about wall anchors? Upscale strips that show up by Googling 'trailer
tiedowns'?

It has a ramp door. Does anyone have advice on a weight limit for loading
through it?

TIA,
Fred Klingener