New shed comes with bonus "floor support pack" instructions unclear but I think my idea is better than what's intended. Suggestions please

so my new shed has arrived. it came with a bonus "floor support pack" basically, 12 lengths of wood, each half the length of the shed.

there's no instructions for it but I think they're meant to go lengthwise like this here but I'm thinking they'll provide more support if laid out crosswise like this here (the pictures show the underside of the base btw) but would be grateful for a second opinion.

If it's relevant, the shed will be on a grid of 3x4 paving slabs with gaps almost like this rather than on solid concrete or earth.

Also, there's no nails or screws for this freebie, which would be best?

Submitted August 08, 2015 at 04:58PM by vmos http://ift.tt/1Nh57To