USEFUL DATA 



a 



B 



i % 



60-h|00 

 (X) ^ 





q«I8 JO 



S3 



8 9 



5 S_ S 

 S S 8 



SoUd 



Concrete 



Slabs 



$ 3 S S S 



!$ S ^ S S 



S3 5? S 



Q 0> CO 

 W -^ CO 



$o 



"Q CO 

 fiS CO 



S"g2 



00 O 



8 S" 



S 8 ^ 



^ "^ p "^ "^ 



00 O CN -^ t^ 



OS .-H e» 



si 1 



i i"l 



CO CO ^ 



S 2 §5 



OS 

 CO .-• b*' 



S g5 S^ 



O CO »0 00 c» 



««t< t^ 0> N iO 



5 S « o 



S t^ OS 



^ 2 



8 ^ S 2 



^ CO 



OS CO 



OS CO 



1-t CO 



00 o 



O CO 

 ?3 (M 



iii 



CS CO CO 



00 O <N 



1-1 t^ CO 



CO CO ^*^ 



CO rf ■g * 



op CO cp 



^ ^ i5 



00 00 "3 CO 



.-H u5 OS »o 



i-H .I 1 -H C^ 



J§ 



^' 



s 



^ ;2: 



§ :S ^ 



1-1 1-H c^ 



s ^ ;^ 



i-( <N CO 



siEigiiigi 



to CO 



00 <N 



^ s 



<N CO 



OS (N 



<3S CO 



(N CO 



\^ n 



CO Tt< 



?5 § 



o ^ 



»0 CO 



00 CO 



CO t^ 



CO CO 



S Jo' 



CO T}< 



;s ^ 



§1 



1— t o 

 CO t>. 



C: ^ 



t>. 00 



s § ^ 



rj< u5 CO 



lO CO S 



CO t^ t^ 



00 OS 

 OS 





s ^ g 



CO 1-1 b- 



CO O Q 



CO Tj< CD 



OS 





^ s ^ 



00 t^ CO 



oot^co«ooooot»k^a» 



::?:;:?;:^;^;^;^;^:^;st;st;st;st;^ 



5o ^ 



{2SgoS8S22^ 



CO CO 



::?^ :^ ::?! :^ :^ 



61 



