How it is built
Nine blocks sit between two decks: one at each corner, one at the middle of each edge, and one in the centre. Between the blocks are openings on every side. The block frame is described as parallel and perpendicular stringers with entry from any side.
Where block pallets turn up
Freight in containers from overseas often rides on block pallets built to a standard other than the American 48 x 40. They end up on west-side docks near the Union Pacific and BNSF terminals, which is why the Northwest Quadrant is a good place to look. They are also common on retail freight.
Block against stringer
| Point | Block | Stringer |
|---|---|---|
| Entry | Four-way, any side | Two-way, or four-way if notched |
| Strength | Even on each side | Strong along the stringers |
| Repair | Blocks can split | Plugs and companion stringers |
| Seen as | Often imported | The American norm |
When to ask for block
- Your forklifts approach from several sides in a tight dock.
- Your racking is designed for block pallets.
- You receive block pallets already and want to keep the same type.
If you ask for block stock, give the footprint. A block pallet at 48 x 40 and one at 1,200 x 800 mm are very different animals, and the 800 x 1200 mm shows why.
Use the quote form with the word block, a count and the size.
Choosing block on purpose
A block pallet costs more lumber and more labour than a stringer pallet, so it should be chosen for a reason. The reasons are four-way entry, automation, container loads and heavy repeat handling. For a one-way carton run, a stringer pallet is usually enough.
- Block suits pallet jacks and forks entering from any side.
- Block suits automated storage that grips at set points.
- Block suits export crates that must be lifted from anywhere.
- Block suits loads moved many times in their life.
What to include in a request
Name the footprint, the grade, whether the stock must be new, and the weight of a loaded pallet. If the pallets go overseas, add the heat-treatment requirement. If they enter a specific rack, name the rack type.
Weight and block size
A heavier load wants a bigger block, so ask what the blocks measure and whether they are solid wood or pressed chips. Solid wood blocks hold nails well and stand up to impact; pressed chip blocks are lighter and cheaper and can crumble. Name the weight in the request and ask what the block is made of.
Sources