How to make an outdoor coffee table. step 1 � make all the cuts and pocket holes per the plans. step 2 � build the side frames.the right angle clamp is such a blessing to make these joints!. step 3 � attach the long aprons to create the table frame and the bottom support for added stability.. step 4 � attach the table top support slats. this completes the assembly of the coffee table. Steps to make the concrete top outdoor coffee table. build the outdoor coffee table base; build and prep the form for the concrete table top; make the concrete table top; assemble the concrete top coffee table; 1. build the outdoor coffee table base. the base of the concrete coffee table is made from cedar 2