https://openjscad.org/#https://gist.github.com/LeLocTai/cc67ddcd70e2fe11e67f1ffe4cb7c12e/raw/deckbox.jscad

deckbox.jscad

function makeBox(w, h, l, thick){
    return difference(
        cube({size: [w + thick, h+thick, l], center: true}),
        translate(
            [0,0,thick],
            cube({size: [w, h, l], center: true})
        )
    )
}

function cutOut(toCut, radius, depth, offset){
    var start = offset;
    var end = [...offset];
    end[1] += depth;
    return difference(
        toCut,
        cylinder( {
            start,
            end,
            r1: radius, r2: radius
        } )
    )
}

function deckbox () {
    var box = makeBox(50, 15, 80, 1.6);
    return cutOut(box, 25, 10, [0,0,60]);
}

function main () {
  return deckbox();
}