For my garage entrance I am going to build a two foot by three foot platform.
To start, build a simple box of two by sixes. I had mine cut to size at the lumber yard. I am also using pressure treated lumber, so I'm using decking screws that won't rust.
Once the box is assembled, check it for square by measuring from corner to corner in both directions, the measurements should match. Next, assemble a second box inside the first to act as support for both the outer box and the step's tread. Secure the inside box to the outside with screws.
Next, you need cross supports for the top tread. For a two by three box, place two cross pieces twelve inches apart. Again, secure it from the outside of the box.
Once the framing is assembled, you're ready to build the top. For a finished look, I want to build a frame for the outer edge, kind of like a picture frame. To do this, cut inch and a quarter decking boards with forty five degree angles at each end.
Secure your frame to the top of the box with more screws - make sure that your corners are tight.
Once the frame is secured, you want to fill the center portion of the frame with more decking.
A solid finished platform step for my garage. For specific measurements on this two by three step, check out my website. I'm Mrs. Fixit and it's just that simple!