Deck Selection

Most communities in S.E. Michigan require a minimum12 ” dia. x 42″ deep hole. That will put the bottom of the hole below the frost line.

While not a bad idea for older deck framing that is getting rebuilt, it is not necessary for newer decks since framing components are now pressure treated to ground contact level.

Yes, they are. They spread out the load of the support post. Most communities in S.E. Michigan require a minimum 7′ thick x 12″ dia. concrete pad.

Yes, it is.  With proper drainage around the posts, they can last for decades. Wood support posts are pressure treated to the highest level. Most brands carry a lifetime limited warranty against fungal decay and termite attack.

They have become popular for those homeowners that want the extra assurance they give.

Yes, it is. With proper sealing and flashing, there should never be an issue with water infiltration. Homes with certain types of siding (brick) will require the deck to be self-supporting.

That will vary depending on the height from grade the posts will extend and the load they will carry.

That will vary depending on the distance the joists will extend from the house to the beam.

That will vary depending on the span of the joists between bearing points.

Joists are typically spaced 16″ o.c. for decking that is run perpendicular pattern and 12″ o.c. for diagonal decking.

Fasteners should at least hot dipped zin coated steel. All hardware should be rated ASTM-A653 Type G185.