CONSTRUCTION OF WALKS AND DRIVES 93 



on to the ramp it is figured that eight feet six 

 inches should be the minimum clearance allow- 

 able and that ten to twelve feet is preferable. 

 In laying out a ramp it is well to be liberal so 

 far as service is concerned at the same time 

 heeding the dictates of esthetics which demand 

 the least possible display of cement. 



For ordinary cases and pleasing to the eye, 

 the opening width of twelve feet is sufficient for 

 an approach from either direction, and the 

 throat opening, made equal to the overall width 

 of the runway, gives the correct appearance 

 when viewed from the front. The side Hnes of 

 the ramp come into the Hne of the walk at a 

 right angle. For the most pleasing results this 

 is essential in normal cases. The ramp curbs 

 should be made to articulate on easy curves with 

 the street curb. A bad joint or a sharp angle 

 where the two come together is certain to spoil 

 the appearance of the work. The track of the 

 car as it approaches and enters the grounds is 

 on a curve, and it is only rational to curve the 

 side lines of the ramp. 



If the runways are eighteen inches wide, any 

 driver can keep on them while backing out, and 

 curbs are not needed as a guide. 



