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UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
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English
Boning Rods: Three Identical T-Rods, 3 ft × 3 in × ½ in, Baker 1919
Boning rods are three identical T-shaped rods for setting out a level line or an even fall by eye. Paviors used them, and drainers found them indispensable. This is the size given in Baker's surveying textbook: 3 feet long, 3 inches wide, ½ inch thick, with a cross head about 6 inches long. Drainers usually made them longer.
Source: T. Baker and F. E. Dixon, Land and Engineering Surveying, 23rd ed., Crosby Lockwood, London 1919, p. 106. The cross head's section, the fixing and the tools are ours. The picture shows boning rods set out for field drains (Alan Murray-Rust, CC BY-SA 2.0).
Utangiye
1 hour
Amabwiriza
1
1
Cut three equal rods
Cut three equal rods
Saw three rods 3 ft (914 mm) long from board 3 in (76 mm) wide and ½ in (13 mm) thick. They must be exactly alike: square the ends and plane them to the same length. For drains, make them longer, all to the same length.
Ibikoresho by'iyi ntambwe:
Ikibaho cy'igiti cya pinusi1 as requiredIbikoresho bikenewe:
Umucumita w'Intoki
Ikoresho cyo gusiga ibiti
Igipimo cy'inguni ya dogere mirongo cyenda
Umurongo w'ipima
Ikaramu ya penisile2
2
Cut three cross heads
Cut three cross heads
Cut three cross heads about 6 in (152 mm) long. Ours: from the same board, with square, straight top edges.
Ibikoresho by'iyi ntambwe:
Ikibaho cy'igiti cya pinusi1 as requiredIbikoresho bikenewe:
Umucumita w'IntokiIkoresho cyo gusiga ibitiIgipimo cy'inguni ya dogere mirongo cyendaUmurongo w'ipima3
3
Fix the heads square
Fix the heads square
Fix each head across the top end of a rod, centred and square to it, to make a T. Ours: glue and two nails. Check that the three rods stand exactly the same height to the top of the head.
Ibikoresho by'iyi ntambwe:
Ikinyabutabire cy'Ibiti1 as required
Imisumari6 ibiceIbikoresho bikenewe:
InyundoIgipimo cy'inguni ya dogere mirongo cyendaUmurongo w'ipimaIbikoresho
3- 1 as requiredUmwanya
- 1 as requiredUmwanya
- 6 ibiceUmwanya
Iki gishushanyo gikora
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