MiNDELEFF] REPORT OF H. C. RIZER 341 



yards froDi the exterior walls of tin- biiikliug, within an area of 10 feet 

 of said walls. 



I also find the amount of iiuderpiuuing done by the contractors to 

 be 919 cubic feet, and the amount of tilling in oi)enings to be 1,101 

 cubic feet. The underpinning is done with hard-burned brick laid in 

 good cement mortar extending to a depth of 12 inches below the orig- 

 inal ground level. The face of the brickwork is set back from 1 to L' 

 inches from the face of the wall and ])lastered with a coat of good 

 cement mortar, making it flush with the outer wall. 



In tilling in cavities more than 500 lineal feet of 2 by 4 inch squared 

 lumber was used to replace broken-out lintels and laid side by side 

 across nearly the whole thickness of the walls, with not more than 1 

 inch space between the boards. They occupy the same horizontal 

 planes as the original lintels, and the walls are trimmed to aflbrd solid 

 resting places for them. The oi)enings above the lintels have been 

 filled in the same manner as the underpinning, with hard-burned brick 

 set back 1 inch from the wall surfaces and plastered with a coating of 

 cement mortar, bringing it out flush with the original wall. 



I further find that the contractors have placed one wooden brace 

 and two iron braces as designated in the specifications. The wooden 

 brace is constructed of two pieces of good, clear, squared lumber 6 

 by S inches in cross section, well bolted together, secured l)yi)lates of 

 boiler iron three-eighths of an inch thick and 14 bj' IS inches square. 

 The specifications provide for this brace to run from the south side of 

 the south wall through the center room with a plate on each side 

 of the south wall and one on each side of the wall on the north side of 

 the center room. The contractors have deviated from these re(iuire- 

 ments in having extended the said brace through the entire length of 

 the building and placed the plates that were specified for the north 

 wall of the center room on the respective sides of the extreme north 

 wall of the building. While this deviation adds nothing to the secu- 

 rity of the south wall, it is doubtless as effective as it would have been 

 had it been placed as contemplated in the plan. It may in some 

 degree strengthen the north wall, and I recommend that it be accepted 

 as in compliance with the terms of the contract. The two iron rods 

 called for in the specifications are of wrought iron li inches in diam- 

 eter, secured by boiler-ii-on plates three-eighths of an inch thick and 

 12 inches in diameter, securely fastened as required in the siiecilica- 

 tious. There was a necessary deviation from the plan as to the place 

 the rod nearest the east side of the building should be jdaced. Earlj- 

 in the prosecution of the work a portion of the debris in contact with 

 the eastern wall was removed. During the night following this a 

 section of the south end of the east wall fell, carrying with it that 

 portion of the wall between the south and east rooms to which the 

 plan required said rod to be attached. In consequence the con- 

 tractors placed the rod so as to connect it with the portion of the wall 



