Thames barges were built for strength. They had flat bottoms to allow them to be easily beached or lie on the river mud, and were rigged to allow them to be operated by two men and possibly a lad. They were built in bargeyards adjacent to a river or creek on bargeblocks- a series of trestles raised about a metre from the compacted ground, that allowed working access above and below. The smallest barges were the river barges of 100 ton capacity, the estuary barges were generally heavier 120 -140 tons and the coasters reaching 160-180 tons. At 280 ton, the four
Everards barges built in
Great Yarmouth and the R & W Pauls,
Brightlingsea built barges
Barbara Jean and
Aidie were the largest. Barges were built exclusively of wood until 1900, when the first steel barges appeared. During its active life it could be doubled or boxed- that is a second shell of planking would be fixed over the first.
Kathleen was a typical grain barge built at Gravesend in 1901. She became notable by featuring in two reference books, where her measurements were published in great detail. Over time her rig was changed to suit commercial conditions. The
keel was a piece of
elm. It was broader than it was deep and long. At the bow the
stempost was raised vertically and at the stern the
sternpost, these were made from lengths of
English oak. The apron and the inner sternpost were strengthening timbers. The fore and aft
deadwood would raise the floors to give shape at the bow and the sweep to the
fashion timbers of the
transom. Across the keel and deadwood were laid the
floors, these were
oak timbers at centres. The length of each floor would be taken of a
half hull model, most would be long, the same length as her beam. On top of the floors, on top of the keel, on earlier barges was bolted a massive
Oregon pine keelson. This used iron bolts. On
Kathleen the keelson was a made of a steel section, in profile similar to railway line (): it was cheaper but could distort. The keelson would be scarfed into the apron and deadwood and would be shorter than the keel. There were equivalent
stemsons and
sternsons. The
futtocks (side-frames) were dovetailed onto the end of each floor and every other joint was strengthened with an iron angle plate. The futtocks were of oak and of varying length averaging . Temporary cross-poles were used to hold the ends of the futtocks in place. The barge was now
in frame, and the
shipwright approved the lines.
Ribbands were temporarily nailed to the outside of the frames to hold this position. The inner angle between the floor and the futtocks were stiffened by inner chines or chine keelsons, made of a single piece of
pitch pine This was bolted to each floor and futtock. Above it was a oak stringer that was bolted to the futtocks and led out to stem and stern post.
Ceilings and linings The ceilings were now laid on the floors. These would be pine planks , and as wide as available. The height of the deck was marked on the frames – forming a beam-line, and a beam thickness beneath it, a oak
inwale was bolted to the futtocks. The inside of the
hold was lined with thick
pine. The inwale formed a ledge on which the curved beams of the deck, and the
carlings rested. The two large holds made it impossible to use deckbeams alone. There were 3 beams afore the forehold, three beams under the mast-case between the holds, 2 between the mainhold and the companionway to the cabin, two supporting the transom. On the Kathleen, the port and starboard decks were of differing widths.
Leeboards and rudder The
leeboards are a distinguishing feature of wherries and Thames barges. They are needed to prevent lateral movement in the absence of a keel. On the Kathleen they were made of thick oak and strapped with seven iron straps. They weighed around were long and had a fan, They were pivoted from the gunwale, and dropped below the hull. They were raised by means of two crab
winches. Partially raised leeboards could be used as a means of steering, and in shallow waters, the barge could be
pivoted on a leeboard that was being dragged in the mud. The
rudder was attached to a square oak rudderpost. The blade of the rudder was wide made up of boards tapering from to . On older smaller vessels, there was a long
tiller. On a few vessels, ropes/chains and pulleys were attached to the rudder post and these lines passed round a drum with a conventional ships wheel- on the vast majority of barges, the rudder was attached to the wheel by an intentionally loose fitting
worm screw gear. Some barges had an all metal ships wheel: this was known as the
chaff cutter after the similar-looking agricultural tool.
The rig When she was built,
Kathleen had a
bowsprit,
main mast and a
mizzen mast. She was rigged with
spritsails on both masts and a
topsail on the main. She was rerigged in 1926 without a bowsprit. In 1946 she lost her mizzen when an engine was added. In 1954 her rig was reduced to that of a motor barge, and from 1961 to 1965 she was used as a
lighter, with engine and mast stripped away. When she was converted to a barge yacht for the 1966, 1967 sailing races, her rig was similar to that in 1926. This was the classic
spreetie rig. Early spritsail barges were rigged without a top mast: these were called
stumpies, and they sailed as a separate class in the Thames barge race until 1890 which was won by
Early Bird. The loose footed spritsail was suited to river work. The rig has the advantage of allowing a high stack of deck cargo. The entire sail can be quickly brailed to the mast, allowing unimpeded access to the deck and hold when loading and unloading. Barges are un
ballasted and, if overpressed, will heel excessively and must be pulled to wind. As the
sheet is eased, the aft end of a boom would drag in the water, making the rudder ineffective and a capsize inevitable. In contrast, the sheet of loose-footed mainsail is just released and control is immediately regained. As there is no boom to project outboard. the vessel can pass through a narrow gap between moored vessels. Loose-footed sails do suffer from
sail twist, which reduces their aerodynamic efficiency when sailing off the wind, which usually is not a commercial issue.
Vangs control the head of the mainsail and act a sheets for the topsail, which can be set so as to make use of the air above the wind-shadow of moored ships, warehouses and local features. , head of the spar steadied by the vangs. Sail could be shortened rapidly by the two-man crew in the most difficult seas. The topsail was on hoops, so the halyard was let go and the sail
rucked (dropped) to the hounds. The mainsail was pulled tightly to the mast by brails. The vangs were slackened, the sheet released and the sail
brailed up by the mate using the brailing winch. The mate let go the foresail halyards and it dropped to the deck. If she was beaching, the crab winches were manned and the leeboards hoisted to stop them bumping. The anchor was let go. She could be unloaded onto the sand when the tide had dropped. The sails were secured and the spreet was fixed and warps and fenders made fast. In narrow channels, and in the lee of tall buildings the mainsail and mizzen are brailed and the bowsprit topped up, and she sails on topsail and foresail alone. A gaff rig was more suitable for heavy weather and long sea passages, but when a gaff rigged boomie takes in the mainsail, she cannot set the topsail. A
boomie is a flat-bottomed ketch-barge, ketch rigged on the main and the mizzen; the sprit was replaced by a
gaff, and the foot was tied to a boom. These were big barges that were built to finer lines often with a false
clipper cutwater, and a rounded
counter-stern. It had a standing bowsprit, and the mast was stepped on the keelson. It took four or five men to sail, took more space on the wharf and could not operate on its topsail alone, so it was more suited to longer sea journeys; the centre of gravity of the stowed sails was lower and the crew accommodation more comfortable. When times got hard, some of these barges would be re-rigged with a sprit on the main but leaving the gaff on the mizzen, becoming a
mulie. The biggest barge ever launched in Kent,
Eliza Smeed (1867) was rigged as a
barquentine fitted with leeboards. The Thames and Medway sailing match community divides the barges into two classes: the
staysail barges whose foresails are attached to the mainstay, and those having a bowsprit, known as
bowsprit barges. The Medway and London river barges generally are staysail barges and the estuary barges that do the longer open water runs up the
Swin and the
Wallet channels tend to be the larger bowsprit barges. Barges can change rig and class, as the Kathleen did. For racing purposes, extra sail can be carried: additional staysails and
spinnakers.
Spars The mainmast was made of spruce, it was to the head, and it was to the hounds. The sprit was . The topmast was to the hounds, it had a pole, and a headstick. The mizzen mast was to the head. The sprit was , and the boom was . The bowsprit was with outboard.
Standing rigging The original barges were rigged with
hemp, where most barges in use today use
wire ropes. The standing rigging had to hold the masts, and sprit in place. As the masts were lowered and raised to clear bridges the
forestay was connected to the
windlass. The topmast could be lowered. The lower end of the sprit was held to the mast in a 'muzzle', but held aloft by the 'stanliff' or 'standlift' chain. She was rigged with shrouds.
Sails The mainsail was (weather), by (head) with a leech of and a foot of , giving a sail area of . The topsail was (weather), with a leech of and a foot of , giving a sail area of . The foresail was (weather), with a leech of and a foot of , giving a sail area of . The jib was (weather), with a leech of and a foot of . Her jib topsails were (weather), with a leech of and a foot of , giving a sail area of , and a lighter set with (weather), with a leech of and a foot of , giving a sail area of . Her mizzen was (weather), by (head) with a leech of and a foot of , giving a sail area of . The sails on a Thames barge are
red ochre in colour. The sailcloth is of
flax, and to be kept in a supple and waterproof condition it must be dressed. Importantly, the flax must not dry out or will chafe against the rigging or against the brails when not in use. ==Preservation==