Canadian engineer . is not common to Montreal. Thisis exemplified in the Herald Building. The building inquestion is carried on what is known as a floating founda-tion ; that is, the columns, instead of each being- carried onan individual footing-, are all set in one immense footing ormat, which covers the whole area of the lot. The reinforcedconcrete mat, 2K ft. thick, at the Herald Building- is builton a bed of gravel overlying black sand of considerabledepth. The idea of spreading the footing-, as mentioned, was to reduce the load per square foot, the loading of the soilin this case being e
Canadian engineer . is not common to Montreal. Thisis exemplified in the Herald Building. The building inquestion is carried on what is known as a floating founda-tion ; that is, the columns, instead of each being- carried onan individual footing-, are all set in one immense footing ormat, which covers the whole area of the lot. The reinforcedconcrete mat, 2K ft. thick, at the Herald Building- is builton a bed of gravel overlying black sand of considerabledepth. The idea of spreading the footing-, as mentioned, was to reduce the load per square foot, the loading of the soilin this case being estimated at one ton per sq. ft. In certain sections of the city wooden piles have beenused in the foundations, as these were thought to meet con-ditions^ satisfactorily. Along the harbor front severalstructures are carried on concrete piles, both the mouldedin the ground and built-up types having been used. At the Montreal General Hospital we have a more diffi-cult class of foundation work. Here the open method was. Driving Steel Sheeting, General Hospital, Montreal. used, steel sheeting- being driven and the madeinside same down to hard pan. These piers were circularin form, though of varying diameter. The sheeting- wasdriven to depth wirh both steam and drop hammers. Tofacilitate handling- these and the pieces of steel sheeting,four stiff-leg derricks were set up at different points on thelot. On this work the average distance from the lot, as ex-cavated, to the hard pan on which the piers were started, wasapproximately 30 ft. The Windsor Street extension is another example of theopen method, differing, however, in manner of executionfrom that just described. This work comprised the construc-tion of approximately 300 piers, a few rectangular but mostof them circular in form. The Foundation Co. started onthis work the latter part of November, iqoq. and finished
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
