THE NEW STEAM ENGINEERING BUILDINGS FOR THE BROOKLYN 



NAVY YARD.* 



The new buildings constructed for the steam engineering depart- 

 ment of the Brooklyn Navy Yard, at New York City, to take the place 

 of the buildings destroyed by fire on Feb. 15, 1899, consist of a ma- 

 chine shop, an erecting shop and a boiler shop, arranged to occupy a 

 U-shaped area. The erecting shop is 130 x 252 ft., the machine shop 

 is 130 x 350 ft., and the boiler shop is 96 x 300 ft. 



The general framework details of the machine, and the erecting 

 shops are shown by Fig. 181. The construction of the boiler shop is 

 similar, but the dimensions are, of course, smaller. Referring to the 

 drawings of Fig. 181, it will be observed that the buildings are divided 

 transversely into three bays, a center bay 70 ft. wide and two 3O-ft. side 

 bays. The two side bays are covered by shed roofs, above which rise a 

 clerestory and gable roof to cover the center bay. The side wall columns 

 are 12-in. I beams filled between with a brick wall for a height of about 

 4 ft., and above this point covered with glazing to the cornice line. The 

 intermediate columns are of lattice and channel construction, and are 

 43 ft. 6 ins. high, reaching to the level of the junction of the shed roof 

 and the clerestory. They carry between them, longitudinally of the 

 buildings a double intersection truss 15 ft. deep, and support a box 

 girder crane runway and the roof columns of the clerestory. 



The framework is entirely of steel of from 60,000 Ibs. to 70,000 

 Ibs. ultimate strength, and an elastic limit of one-half the ultimate 

 strength. The specifications for workmanship and other essentials 

 correspond to ordinary first-class practice in these respects. The no- 

 table feature of the building is the extent to which glazing has been 

 employed in the side walls and roofing, rather than in any novelty in 

 the framework structure. 



The foundations consist of. concrete column pedestals carried on 

 piles, the column base plates being anchor-bolted directly to the con- 

 crete. The concrete used was mixed according to the Navy Yard 

 specifications, which require that the cement exceed the voids in the 

 sand about 25%, and that the dry mixture of cement and sand exceeds 



*Engineering News, April 25, 1901. 



