Jerry, were you not using pressure treated lumber for the addition, with the copper content in the wood, you could then solder or braze the project, use a rosebud tip for better flame distribution and SilFos brazing rod, that way you won't need brazing or soldering flux. Let me know if I can be of any other assistance.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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