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| factorofadhesion = | trainheating = | locobrakes = | locobrakeforce = | trainbrakes = | safety = | operator = NZASM Imperial Military Railways Central South African Railways South African Railways | operatorclass = NZASM 32 Tonner CSAR Class G | powerclass = | numinclass = 4 | fleetnumbers = 991-994 | officialname = 32 Tonner | nicknames = | axleloadclass = | locale = | deliverydate = 1894-1897 | firstrundate = 1894 | lastrundate = | retiredate = | withdrawndate = | preservedunits = | restoredate = | scrapdate = | currentowner = | disposition = | notes = }} The Nederlandsche-Zuid-Afrikaansche Spoorweg-Maatschappij 32 Tonner 0-4-2T of 1894 is a South African steam locomotive from the pre-Union era in the Transvaal. In 1894 and 1897 the Nederlandsche-Zuid-Afrikaansche Spoorweg-Maatschappij of the Zuid-Afrikaansche Republiek (Transvaal Republic) placed four rack tank locomotives with a 0-4-2 wheel arrangement in service on the rack section between Waterval Onder and Waterval Boven. Since the railway classified its locomotives according to their weight, these locomotives were known as the . ==Waterval Onder to Waterval Boven== The construction of the railway line from Delagoa Bay to Pretoria was beset with difficulties, both in terms of disease and engineering. Malaria claimed many lives among the construction crews and the terrain was mountainous.〔 In terms of construction, the climb up the escarpment from the Eastern Transvaal Lowveld to the Transvaal Highveld was arguably the most difficult section that the railway builders encountered on the route. When the line reached Waterval Onder, they had a choice between a lengthy detour with sharp bends and costly deep cuttings and bridges, or a shorter route that would entail gradients of 1 in 20 (5 per cent) in places, as well as a tunnel.〔 The shorter and steeper route was selected and to overcome the steep gradients, a rack railway, built to the Riggenbach system, was laid on the section up the escarpment between Waterval Onder () and Waterval Boven ().〔 The Riggenbach rack system used a ladder rack formed of steel channels connected by rods at regular intervals. The original tunnel’s portal coordinates are (eastern portal) and (western portal). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「NZASM 32 Tonner 0-4-2T」の詳細全文を読む スポンサード リンク
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