go FIRE-RESISTING I'.L' ILDINGS. 



A. A j^artition of corrugated helical steel lathing of -'^-4" 

 mesh, secured to i" X i" vertical iron studs at 24" centres, 

 Avith l^" X /V iron bars fixed between them at 12" centres, 

 and running same way as the studs, plastered both sides with 

 lime, sand, and hair, with 5 per cent, of Ir^ortland cement added, 

 finished 2-)4" thick. Stood i^ hours' exposure to a maximum 

 temperature of 2,000° F. 



B. A partition with 4" X -" timber studs at i4/^" centres, 

 covered both sides with wire netting, and over that ■;4" matched 

 boarding ; the whole space between studs being filled with silicate 

 cotton (slag wool). Stood three-quarters hour exposure to 

 maximum temperature of t.8oo° F. The fire did not pass 

 through the partition, though the inside l)oarding was consumed 

 and the studs charred ;?/4" deep. The outside boarding and the 

 rest of the studs were intact. 



C. A partition with 2" X ^Vs" deal studs at i<S" centres, 

 covered both sides with ^^'h" grooved and tongued and beaded 

 boarding treated by the Oxylene i)rocess as being non-flammable. 

 Stood three-quarters hour exposure to a maximum temperature 

 of 1,600 ° F., and the fire did not ])ass through, except at the 

 tongued and beaded joints, which were the weak points. 



Piers, Stanchions, and Columns. — The following are tests 

 and results of same upon 6" >; 4/2" 20 lb. steel stanchions 

 13' o" long, and loaded up to three tons, exposed for 2^^^ hours 

 to a temperature from t,8oo° F. to 2.100'' F.. encased as fol- 

 lows : — 



No. 1.— With 4->'s" terraw ode l)ricks, 9" X aW X 3". un- 

 plastered. Maximum temperature between encasement and 

 stanchion, 310° F. 



No. 2.— With ly/' terrawode tiles. 9^%" X 12" X 2]//', 

 un])lastered. Maximum temperature between encasement and 

 stanchion, 1,100° F. 



In both cases the stanchions were apparent!}' unattected. 



The following are tests upon unprotected columns : — 



No. 3. — A steel column composed of two 10 inch 15J/ lb. 

 steel channels, fixed 6^" apart, web to web, with 12" X Ya" 

 plates rivetted to flanges of both channels, giving an over-all 

 sectional dimension of 12" X 10", with over-all length of. say, 

 14' o" and load of 46 tons. Buckled at maximum temi)erature 

 of 1,200° F. 



No. 4. — A cast-iron column, hollow, round. \" metal. 8" 

 external diameter, over-all length, say, \2>' o". with load of 84 

 tons. Column red hot, and flecidedly bent, at maximum tem- 

 perature of 1.200° F. 



Protected Steel Girders. — The following are tests and results 

 of same upon 7" X ~%" steel joists, say. 10' o" between 

 bearings, and not loaded. Joists covered with -i^". 24 gauge. 

 No. I expanded metal, and 3^'^" of a composition of water, 

 plaster, hydraulic lime, coke sand, and asbestos, with an addi- 

 tion of sulphunc acid. 



