258 



BRIDGE ABUTMENTS AND PIERS. 



CHAP. VI. 



^ - } 



" Old Raffs in Foundation in Tons '8/0 of j 

 flasonry in Foundation^ in Cubic Yards 

 when Foundation is 4 ~0' deep. 



fingle 



5" 

 10 

 15 



20 

 25 



30 

 35 

 40 

 45 

 50 

 55 

 60 

 65 

 70 

 75 



Secant 



1.004 

 1.015 

 1.035 

 1.064 

 1.103 

 1.155 

 1.221 

 1.305 

 1.414 

 1.556 

 1.743 

 2.000 

 2366 

 2.924 

 3M4 



For Skewed Piers multiply 

 quantity from Curve by 

 Secant of ftngle of Skew. 



For Skew Cress 

 ings increase ft 

 ifnecesssry. 



For each additional fool in width of Pier 

 add to Masonry in Cubic Yards 



Foundation 



24- 



Body IVa// 



12 



10 



202428 Seat 



/823 



24 33 42 51 \W 



17 



2& 33 40 47 



2834 



1.0 



1.9 



3.8 



DECK BRIDGE. 



'- -Quantities shown by curves are Nt 

 and calculated from pier shown hereof}. 

 Foundation based on depth of 4-0 " 

 for Piers without starkwater use 

 'quantities given by broken line curves. 



Masonry in Foundation Masonry in Body Wall 



100 200 300 j 



!.. / Cabic^rds oF Masonry 



\ I i_l I II I 



Tracks !/ 2 3 4\ \J_ 

 flasonry in Foundation 



100 200 



flasonry in Body \Va// 



300 400 



500' 



Cubic Yards oF flasonry 



FIG. 9. QUANTITIES IN MASONRY PIERS, N. Y. C. & H. R. R. R. 



