220 AUTOBIOGRAPHY OF JOHN FRITZ
9 feet wide ui the north roof. The main aisle of the build¬ ing is 49 feet 2 inches between centers of crane colunms, and has a clear height of 40 feet. The remainder of the width is taken up by two sides aisles, 20 feet in height.
The laboratory consists of four sections: (a) a general testing section containing the testing machinery, a smaU macliine shop, and the office; (b) a cement testing room;
(c) a room for making and storing concrete test specimens;
(d) a hydrauUc section.
The testing section occupies the larger part of the western end of the building and contains all of the testing machines except the briquette machines, which are in the cement section. For facflity ui handUng the test specimens, a lo-ton crane, 47 feet 2 inches center to center of runway beams, operated by three direct-current motors, has been instaUed. A smaU machine shop, containing a driU press, lathe, milUng machine, shaper, etc., operated by a 7.5 H.P. motor, is available for general repair work.
The principal equipment of the testing section proper is as follows:
Type of Machine. Capacity in Pounds.
Tension and compression 20,000
Wire tester 20,000
Cold bend r.5 inch diameter "bar
Torsion 24,000 inch pounds
The cement testing section occupies a separate room on the main-floor level. The equipment consists of tables for making cement specimens, storage tanks, briquette testing