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UPDATE: It's a 6-pounder mounted on the back of an Albion 6 x 4 (BY1?) in 1940 at Chatham from memory: L 211542, V.3560 Lorry 3-ton G/S, Pontoon, TSR, Folding Boat Equipment, LLB, SBG, Break Down'. Excuse my ignorance but what doies TSR, LLB, and SBG stand for? [/B]
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Probably a bit late in the day to answer your question!
for the record:
TSB - Trestle and Sliding Bay. Used to carry trestle equipment for MkV pontoon bridge. The sliding bay was a length of roadway to accompany trestle equipment. Obsolete in 1944 (replaced by Bailey pontoon bridge).
TSB Trestle load
On frame: 14x Roadbearers, long, plain; 2x Roadbearers, long, button; 2x Ribands, long.
In the well: 1x Transom; 2x Transom legs; 2x Struts; 21x Chesses.
On side shelves: 1x Saddle; 4x Chesses; 2x Chesses, stiffening.
In the forward compartment: 2x Shoes; 2x Shoe extensions; 2x Jacks; 3x Racking channels; 3x Racking bolts; 1x Trestle transport case; 4x Ropes; 2x Lashings; 3x 5' Pickets; 2x Mauls.
Sliding Bay load:
On frame: 14x Roadbearers, long, plain; 2x Roadbearers, long, button; 2x Ribands, long.
In the well: 25x Chesses; 2x Rafting levers.
On side shelves: 2x Chesses, stiffening; 5x Racking boxes; 4x Roadbearer lifters.
In the forward compartment: 8x Ramps; 5x Bridging spikes; 2x Hammers; 2x Holdfast anchors; 2x Ropes; 2x Lashings; 3x Sliding Bay guides.
TSB body was used on Albion BY1 & BY3, AEC Marshall and Leyland Retriever; also fitted to Diamond T 975 but never used since equipment was obsolete so these chassis were fitted with Coles cranes in UK.
LLB - Long Landing Bay. Used with MkV pontoon bridge. Standard GS body with holes in headboard and tailboard to allow protruding pins on box sections. Obsolete in 1944 (replaced by Bailey pontoon bridge).
LLB Load:
4x Hornbeams fit into the body well laid horizontally in two layers with the large ends pointing in opposite directions so that they interlock;
2x Centre box sections fit vertically on the wheel arches;
2x Ramps with their narrow ends overlapping to fit outside the box sections;
3x Ribands fit over each of the pairs of of ramps;
5x Deck panels lie over the hornbeams in the body centre;
Small part slie inside the bottom hornbeams.
SBG - Short Box Girder. SBG Mk2 & Mk3 was in use in 1939; obsolete in 1944 (replaced by Bailey bridge), although SBG Mk2 components were used in SBG assault bridge carried by Churchill AVRE in 79th Armoured Division.
SBG Load 1:
On frames: 4x Box sections; 2x Launching nose on top of box sections; 2x Launching cradles on rear ends of outside box sections.
In toolbox: 4x Cradle Pins; 16x Dogs.
SBG Load 2:
On frames: 4x Hornbeam sections; 1x Launching nose on top of hornbeams; 1x Launching cradles on rear ends of one of the hornbeams; 4x Ramps on top of hornbeams; 2x Bankseats on top of hornbeams.
In toolbox: 9x Dogs; 4x Cradle & Ramp pins; 4x Launching rollers; 4x 6 fathom lengths of 2" lashings.
In hornbeams: 3x Handspikes; 8x Carrying bars; 4x 5' Pickets; 1x Maul.
SBG body was used on Albion BY1 & BY3, AEC Marshall and Karrier CK6.
I will try and dig out some photos.
David