Parkour block 1525 × 1525 × 500
A low obstacle sized to a whole 1525 × 1525 mm plywood sheet, on a 5 × 4 grid of 50 × 50 mm timber, with a pair of two-hand carry slots on the front and back walls.
The 1525 × 1525 × 500 block uses whole panels: top and bottom are full 1525 × 1525 mm sheets, sides 1525 × 464 mm, ends 1489 × 464 mm. A uniform 5 × 4 grid with twenty posts and no extra bracing; the front and back walls each have two 130 × 45 mm slots for both hands, centred 562 and 962 mm from the end (400 mm between the hands), with the middle post between them. Top and bottom are identical, so the block can be flipped. Estimated mass about 130 kg; the parts take four 1525 × 1525 mm sheets.
The 2.5 mm pilot bores and the 130 × 45 mm carry slots are concepts, not certified lifting points. The cube's estimated mass is 221 kg: do not plan a four-person manual lift without a risk assessment and handle testing. Engineering analysis and full-scale testing are needed before children use these obstacles; cover the slots during use to prevent entrapment.
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Individual STEP plywood parts with holes are included in the ZIP package.
