93 



4 In. in every 25 ft. exceeding 100; fourth, walls whose 

 area is not two times or more greater than the area of 

 the openings therein should be increased in thickness; 

 fifth, partition walls 60 ft. or less in length may be 4 in. 

 less in thickness than the outer wall, but in no case should 

 the thickness fall short of 8 in. 



PRICES OF STEEL REINFORCEMENT. 



The cost of steel is based on % in. plain bars, the price 

 for smaller bars increasing. The price at the mills in 50 

 ton lots is $30 a ton. If Ransome twisted bars, $4 a ton 

 should be added for twisting. The Kahn bar, owing to 

 its peculiar form, has more metal but does not require 

 the bending and placing of stirrups. The manufacturers 

 quote prices of various jobs. The cost of putting in steel 

 for retaining walls and arches and ordinary construction 

 varies from $5 to $8 per ton. In building work it runs up 

 to $15 a ton. The prices for the different unit systems 

 and special shaped bars can be obtained from the manu- 

 facturers, whose names we will gladly furnish on appli- 

 cation. 



COST OF DIFFERENT SIZES OF PLAIN RODS. 



Price in cents per Ib. on basis of 50- ton lots at the mill: 

 Size. Bessemer rods, plain. Open Hearth. 



% to 3 in 1.5 1.65 



% to 11-16 in 1.6 1.76 



% to 9-16 In 1.7 1.86 



7-16 in 1.9 2.07 



% in 2.0 2.18 



5-16 in 2.10 2.28 



fc to 9-32 in 2.2 2.39 



Bids Received for Steel for Concrete Reinforcement 



Glendive, Montana. 



8.700 Ibs. bars. . - n ftl <M 



square, H-in. fO.016 fO.018 ?0. 01725 tO.02 ?0.016 J fc jj .018251 



393.000 Ibs. bars. ft ni77t 



re, fc-in. 0.016 0.017 0.01725 0.02 0.015 -[ JJioisis' 



16.450 Ibs. bars. n mr: ( il 



.:-. 1-iM.. 0.016 0.017 0.01125 0.02 0.015 [ oiois^j 



8940 Ibs. b. 

 ><iuar',l^-in. 0.016 0.017 001725 0.02 0.015 



{ J 



Total.... $6,833.44 7.269.23 7,3670318.541.806,415.05 

 1 Plain square bar. 2 Twisted square bar. 



