Dimensions

Plan view

Corner detail

Length breakdown

corner post long board short board interior screw (2 per joint, staggered)

Box height

Fixed — not driven by the form

Storage cavity & access panel

Fixed — not driven by the form

Section through the door end. The cavity clears exactly one 2x6; the shelf's underside is its ceiling, which is why the shelf top sits at 6 1/4".

    Reservoir subfloor

    Proposal — not in the spec yet

    Short 1x8 floor boards run across the box, from a ledger on each long wall to a flat 2x6 spine down the middle. The spine rests on four supports set against your deck's joists: a full-width cross block just behind the fittings, a block on each of joists 2 and 3, and a cross-ledger on the far wall. Nothing is cut into the built box. Replaces the ledger-and-mid-span-beam scheme.

    Plan — from above · floor seams dashed · your deck's joists green (solid measured, dashed assumed) · screws red

    Long section down the middle, through your deck and joists — heights exaggerated ×2.2

    Section across the box, 11" in from the door end — looking back toward the door

    Cutting everything — four new 1x8s, and the 2x6, 2x4 and two 2x2s you already have

      H2O Management

      Fixed — not driven by the form

      Routing the dados

      Fixed — not driven by the form

        Board lengths — groove bottom to groove bottom

        Long side board —
        Short side board —