I am currently renovating a 1901 house to live in after I am finished. Attached is a sketch of my spare bathroom. I am having trouble with the vanity sink drain pipes. The sink is against an interior 2x6 bearing wall. Directly below the 2x6 wall is a 6x6 beam with 6x6 posts on blocks. Is there a different way for my drainage pipe to go besides directly through the 6x6? Do pipes ever 45 out of the wall then 45 down almost around the 6x6? I am a structural engineer so if I have to go through the 6x6 I can fix it to work structurally I'm just wondering if there is another way to plumb around it.