We need to calculate the quantities of railing per linear meter, the quantities should distribute to 4 items as follows
1- straight and horizontal.
2- straight and sloped.
3-curved and horizontal.
4-curved and sloped.
Seems not to be exposed 
We need to calculate the quantities of railing per linear meter, the quantities should distribute to 4 items as follows
1- straight and horizontal.
2- straight and sloped.
3-curved and horizontal.
4-curved and sloped.
Seems not to be exposed