Identifier: canadianengineer22toro (find matches)
Title: Canadian engineer
Year: 1893 (1890s)
Authors:
Subjects:
Publisher: Toronto, Monetary Times Print. Co. (etc.)
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

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ed in-dependently. Since the viaduct has quite an appreciable truss at a point over the back truck, by two i^-in. squaresteel tie rods. The booms were of 12 x 12 timber 35 ft. oin. long-, and were capable of lifting 10 tons each. Acrossthe tops of the wooden trusses were laid 6x12 cross ties 19feet Jong, and to these was spiked the floor of the traveller.The engines rested on this platform, being placed over theback trucks in an enclosed cabin. Thus, under the centreof the traveller there was a clear head room of about eightfeet under the cross ties or the height of the trucks plus theheight of the truss. There was also a clear width under-neath of about 12 feet between the trucks. In this space athird track of standard gauge was run along the centre ofthe bridge and on this track the material was brought onhand trucks from the delivery tracks at the east end of thebridge forward to the front side of the traveller within rangeof the derricks. This traveller erected all the truss spans
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Plate 3.—The Strauss Trunnion Bascule Span of the Red River Bridge for the National Transcontinental RaMway. Built by Domiinion Bridge Company, Limited. curve the wheels of the traveller were specially arranged totake the curve easily. This was accomplished by placingan ordinary car truck of four wheels at each corner of thetraveller. The centres of the four trucks formed a base of27 ft. 6 in. longitudinally by 18 ft. o in. transversely, thetraveller running on two tracks of standard gauge with awidth of 18 ft. o in. centre to centre of tracks. The frameof the traveller was made entirely of wood. The two truckson each side are 27 ft. 6 in. apart, supported longitudinalwooden trusses 6 ft. o in. deep. These each had a verticalmast in front 18 ft. 6 in. high of 12 x 12 timber, the top ofeach mast being stayed to the bottom chord of the wooden and approach girders, except the more elevated members ofthe tower and counterweight which were put up with agallows frame. The forms for the co

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