Todd Miller from the Oregon Cottage Company is building another cottage and is sharing with us a series of the steps involved in building a tiny cottage on wheels. You can view Phase I: Subfloor Sandwich System here. Phase II is on wall and roof framing.
Anchoring:
I Begin this phase of construction by making sure I have enough hold down hardware to anchor my wall sill plates to the trailer frame. I use anchor bolts not only tie the sill plate to the subfloor system but to also insure that the system is tied to the trailers frame. I use 5/8” Galvanized through bolts with 2”x2”x ¼” thick steel square washers on the sill plates and 5/8” galvanized cut washers with lock nuts on the underside of the trailer. Since the bolts will be penetrating through both sides of ¼” tube steel I make sure I have a sharp bit with a spare sitting in my bit box. I also recommend another option of using HDU or PHD simpson ties in unison with the through bolts. Then I set my 2×4 wall sill plates and nail them down with 3” nails.
Making sure I hit the 2×4 spacers below the ¾” plywood. Then I locate the anchor bolts. I locate my anchor bolts within 12” of each corner and space them no greater than 36” apart from each other where the sills make contact with the subfloor system. This is the first step in insuring that the wall system will be secured to the trailer frame. The other hold down hardware will include strapping and will be touched upon latter in the next construction phase.
