This trailer holds about 14 cubic yards by volume and 11,200 pounds by weight — whichever you hit first. Heavy materials (gravel, dirt, concrete) hit the weight limit long before they fill the bed. Light materials (mulch, brush) fill the bed before they hit the weight limit. Overloading either way damages the trailer, can void liability protections, and can trigger DOT stops.

Why this matters

The trailer's loaded weight rating (GVWR) is 15,400 lbs total. Subtract the trailer's empty weight (~4,000 lbs) and you have about 11,200 lbs of payload capacity. Going over that rating overloads the axles, tires, and brakes — components designed for that weight, not more.

DOT scales along major routes will pull over a visibly overloaded trailer. Overloading also wears the trailer harder, increases stopping distance, and can damage the suspension and brakes.

The two limits: volume and weight

Volume: ~14 cubic yards in the bed (14' long × ~7' wide × 4' side height). If your material levels off below the rails, you're under volume.
Weight: ~11,200 lbs payload. If your loaded trailer is heavier than that, you're over weight even if there's bed space left.

For dense materials, weight is the limit. For loose/light materials, volume is the limit.

Material weights, per cubic yard

Material	Weight per cubic yard	Volume that hits the weight limit
Mulch (bark)	600-700 lbs	Fills the bed first (no weight issue)
Brush / yard waste	400-700 lbs	Fills the bed first
Drywall / light demo	400-600 lbs	Fills the bed first
Asphalt millings	2,000-2,400 lbs	~5 cubic yards
Topsoil	2,200-2,700 lbs	~4.5 cubic yards
Sand	2,700 lbs	~4 cubic yards
Gravel / crushed stone	2,800-3,000 lbs	~4 cubic yards
Wet dirt / clay	3,000-3,400 lbs	~3.5 cubic yards
Concrete chunks	3,800-4,000 lbs	~3 cubic yards
Mixed C&D debris	1,500-2,500 lbs	~5-7 cubic yards

Worked examples

Moving 4 yards of gravel for a driveway. 4 × ~2,900 = ~11,600 lbs. Just over the weight limit — load 3.5 yards to stay safely under.

Hauling brush from a yard cleanup. 14 yards of brush ≈ 14 × 600 = 8,400 lbs. Well under the weight limit; you'll fill the bed before you run out of capacity.

Tearing out a small concrete patio. 3 yards of concrete chunks ≈ 3 × 3,900 = 11,700 lbs. Just over. Plan two trips at 1.5 yards each, or break the load down further.

Mixed demo debris from a kitchen remodel. 6 yards mixed debris ≈ 6 × 2,000 = 12,000 lbs. Over. Drop to ~5.5 yards or split into trips.

Topsoil for landscaping. 4 yards topsoil ≈ 4 × 2,500 = 10,000 lbs. Under — safe load. 5 yards starts pushing the limit.

What happens if you overload

A few things, all bad:

Damage to the trailer. Axles, springs, and tires can fail under sustained overload. Repair costs come from you per the Rental Agreement.
Unsafe to tow. Overloaded trailers stop slower, sway more, and put extra strain on your tow vehicle's brakes and transmission.
DOT enforcement. A visibly overloaded trailer on a major road can be pulled over. Fines apply, and you may need to offload before continuing.
Voided liability protections. Loading beyond the trailer's rated capacity is a material breach of the Rental Agreement (§ 14, prohibited uses) — meaning any limitation of liability that would otherwise protect you may not apply if the trailer or anything else is damaged.

When in doubt, load less than you think you can. The trailer can do another trip; an overload incident is much harder to recover from.