coping 16 and a liner 18 covers the interior of the wall 14 and the ground surface on which the above ground pool 10 is erected as shown in fig2 and 3 the wall 14 is made up of an elongated strip of sheet metal the base 12 is made up of extruded u shaped sections 19a 19b connected together by joints 22 and defining a continuous slot or groove 20 to receive the bottom edge of the wall 14 the coping 16 is made up of a series of coping sections 17a 17b joined together end to end as will be described a coping section 17 includes a length of extruded plastic material extruded at a predetermined radius corresponding to the size of the pool as is required the coping section 17 includes a ledge portion 30 and overhanging flanges 32 a pair of legs 36 and 38 extend downwardly from the ledge portion 30 the legs 36 and 38 define a narrow slot 40 therebetween this slot 40 snugly fits over the upper portion of the wall 14 bores 42 are formed during the extrusion process and extend parallel to each other in the ledge portion and upper portion of the legs 36 and 38 when the coping sections 17 are joined end to end dowels 44 are inserted in bores 42 in addition and as shown in fig4 and 5 locking buckles 48 are provided underneath the ledge portion 30 the locking buckles 48 have an over center feature.