SPECIFIC A T ION'S. 299 



With each proposal there must be submitted a stress diagram 

 showing stresses to which members are subjected and dimensions 

 proposed. After award of contract, but before materials have 

 been ordered, working drawings in detail shall be submitted to 

 and shall receive the approval in writing of the engineer. 



COVER. 



Surmounting the shell and secured thereto by angular steel 

 connections, a conical (or pagoda) steel-plate cover shall be con- 

 structed. Its height shall be feet above the top of the 



cylinder, and its apex shall terminate in a conical steel-plate cap 

 (or ornamental galvanized fmial). The cover-plate shall pro- 

 ject inches beyond the vertical lines of the shell, forming 



thereby an eave, terminating with a circular angle connection, 

 between which and the shell shall be secured to the cover a... 



by. inch deep facia plate, with ornamental border (or for 



facia plate describe galvanized cornice). At a point at the top 



of the shell an opening by.... inches shall be provided, 



reinforced with suitable angles about its under side and supplied 

 with double steel doors securely hinged. 



LADDER. 



Downward from the metal doors, for a length of feet, a 



steel ladder, secured to the shell at proper intervals, and capable 

 of sustaining not less than one thousand (1000) pounds, shall be 

 provided. 



PAINTER'S TROLLEY. 



inches below the top of the shell there shall be firmly 



riveted a steel shape suitable for the support of a painter's trolley. 



CIRCULAR GIRDER. 



The cylindrical shell shall terminate in a continuous steel 

 plate girder, its lowest ring forming the web, to be not less than 

 - inch thick, and to which angles forming 



