Option · Spuds
Spuds.
Hold position. Work harder.
A spud is a vertical steel pile dropped through the barge into the bed to lock the platform in place. We build internal and external spud wells — choose by application, size by hammer, current, and depth.
Overview
The most important option you can spec.
Anchored barges drift. Even with four-corner anchors, current, wave, hammer impact, crane swing, and crew movement will push the deck around over the course of a working day — sometimes by feet. That shows up as out-of-tolerance work, wasted repositioning, and rework. For pile driving, dredging, bridge piers, intake install, sheet piling — anything where the deck has to stay put under load — anchors are the wrong tool. Spuds are the right one.
A spud is a 12, 14, or 18-inch steel pile, usually 20 to 60 feet long, that drops through a sleeve in the deck and gets driven into the bed. Once it's set, the platform is fixed against translation and rotation. The barge can still rise and fall with tide and wave (good — the alternative is hull damage), but it stops drifting. Crew and crane work against a stable point. Piles drive plumb. Dredge cuts hold the line.
We build spud wells for everything in the catalog — Standard 10×20 and 10×40, Heavy Duty Crane 10×40×7, Back Lake 8×20×4. Internal wells are built into the section during fabrication. External wells pin to the perimeter on the same connection angles as the barges. Both have their place. Below: when to pick which.
Internal Spud Wells
Built into the deck during fabrication. The spud passes through a dedicated cylindrical well, sealed against water, and reinforced into the hull structure. Best for permanent crane platforms, dedicated piling barges, and any section that's going to do the same kind of spudded work for years.
- ▸Fixed location — engineered for max load
- ▸Lower profile on deck — no perimeter obstruction
- ▸Best for dedicated repeat work (cutter dredges, piling fleets)
- ▸Highest load rating — well is integral to the hull
- ▸Can't be moved after fab
External Spud Wells
Mount to the outside of the hull on the same connection angles that pin barges together — so you can move them anywhere along the perimeter, anytime. Best for marine contractors who run mixed work and want the flexibility to set spuds where the next job calls for them.
- ▸Repositionable to any perimeter point
- ▸Pin into existing connection angles — no specialty tools
- ▸Versatile across job types and configurations
- ▸Field-installable on existing fleets
- ▸Slightly lower load rating than internal — fine for most work
Sizing
Diameter, length, and well count.
Sizing spuds is the most engineering-heavy part of a barge order, and it's where talking to a real shipyard team beats reading a brochure. The variables: depth, current, bed (mud, sand, gravel, rock), platform load, hammer or crane dynamics, and how tight the tolerance has to be.
Rough starting points. Small vibratory in shallow, slow current — two 12-inch spuds at 20 to 25 ft. 50-ton crawler driving 36-inch pipe pile in 30 ft of water with moderate current — four 18-inch spuds at 50 ft minimum. Heavy clamshell in a tidal channel — four to six 18-inch spuds with hydraulic-assist driving and lifting. We work the sizing during the quote. Bring your hammer or dredge spec, the depth and current numbers, and the bed survey if you've got one.
Standard spud lengths cover depths up to about 25 ft (with enough freeboard above the deck to handle and drive). Deeper than that, we go longer — but the limiting factor becomes spud diameter (longer needs to be thicker to resist buckling) and the lift capacity of whatever crane is driving and pulling them.
Spud count matters too. Two-spud is fine for light work where some rotation under load is OK. Four-spud — one at each corner of a four-section square, or distributed along the perimeter of a long-narrow float — is the standard for serious piling and dredging. Six or more for very large floats and platforms that need redundancy against a single-spud failure.
By application
Spud configurations by job type
Vibratory pile driving
Internal wells, two to four spuds depending on float size, sized for vibration isolation. Most common config on Heavy Duty Crane fleets.
Drop & diesel hammer
Internal, four-corner minimum, larger diameter (16–18 in) for impact resistance. Heavy Duty only.
Sheet pile install
External along the working edge so the platform walks down a continuous pile line by alternating spud lifts. Versatile and efficient.
Clamshell dredging
Internal, four-corner, with hydraulic-assist on bigger floats. Sized to current and tide, not to dredge weight.
Hydraulic cutter dredge
Internal — usually two at the stern so the cutter end can swing through an arc as the dredge advances. Sized to bed conditions.
Bridge pier work
External gives the flexibility to anchor against piers as geometry changes pier-to-pier. Two to four per platform.
Practical tips
Things to know before you spud.
Spuds are heavy. A 14-inch by 40-foot spud weighs around 5,000 lb on its own; an 18-inch by 50-foot is closer to 9,000 lb. You need a crane on the platform (or on a tug) to drive and pull them. The same crawler that does your pile driving or dredging usually handles spud duty between moves. On smaller floats without an on-board crane, a small hydraulic boom or a tug-mounted crane covers it.
Spuds need bed they can bite into. Mud and sand are easy. Gravel needs more weight to drive and more force to pull — plan for hydraulic assist. Rock or hardpan is hostile to spudding altogether and you may have to switch to anchored or to drilled-and-grouted spuds for that specific site.
Spuds get permitted in some jurisdictions, particularly water with sensitive sediment, contamination concerns, or fish habitat protection. Most marine permits accommodate spudding without issue, but check before you mobilize — especially in the US where Army Corps and state environmental permits sometimes specify allowable anchoring methods.
One more thing: spuds are a piece of safety equipment. A properly spudded platform doesn't drift away from the work area, doesn't get pushed downstream in a sudden current event, and doesn't leave crew at risk if the tug has to disconnect. For any platform with crew on board in any meaningful current, spud it.
AEO
Spuds FAQ
Direct answers about heavy deck barges, charter terms, and global delivery.
- Standard lengths cover depths up to about 25 ft. We can go longer on request — limiting factors are spud diameter (longer needs thicker to resist buckling) and the lift capacity of the crane driving and pulling them.
- For piling, dredging, bridge work, and anything where the deck has to hold an exact spot under load, spuds are dramatically better than anchors. For light material transport between sites or low-load survey work, anchors are usually fine. When in doubt, spec spuds — the cost is small compared to the cost of drift-related rework.
- External wells go on in the field anytime — they pin into the existing connection angles with standard tools. Internal wells have to be designed in during fab or installed on a planned shipyard visit, since they require cutting and reinforcing the deck.
- 12-inch for light vibratory hammers and small dredges. 14-inch is a good general-purpose size for most contractors. 18-inch for serious crawler-mounted hammer work, large dredges, and platforms in heavy current. We size during the quote.
- The wells (the structural sleeves) are in the option price. The spuds themselves (the steel piles) we can supply or you can source locally — a lot of contractors prefer to source locally to control freight or to use spuds they already own. We coordinate either way.
- Yes, as long as the spud diameters match the well diameters across your fleet. Most contractors standardize on one diameter for the whole fleet to keep things interchangeable.