timber coping - fastening to concrete walls?
I have built raised beds out of concrete blocks which will be rendered. For coping, I had a quantity of pressure treated joists, 200x50mm which I have stained and oiled (gah, 4 coats each of stain and Danish oil and three of wax!) I want to attach them to the beds without screwing through the tops - I can use L brackets as there is a generous overhang (the blocks are 100mm wide) but I also want to actually stick them with something. At first, I though I could unibond the timber and bed them on mortar but am hoping for suggestions. Obviously, I don't want to use anything which comes in little tubes or corning guns - there is 30m of running length. I wondered about tile adhesive? Basically, anything which comes in 5 litre tubs ought to be a feasible amount. Ideas?