I'm planning to replace some rotten beams on a free-standing pergola. What is the best way to attach them to the top of the existing columns? The columns are hollow squares made of 3/4" boards with a flat cap (made of a 1/2" board with flashing). The beams are 1 1/2" thick. I can't tell how they're currently attached - maybe just toed in, which doesn't seem very sturdy to me. I'm thinking of using Simpson Z-Max hurricane ties, but is there a better way that will look nicer?