IMG_0540
these pics show a Seaway single ratchet block screwed together with 2 singles to create a lower triple, you must remove the attachment pins from the 2 singles so the centre pin on the ratchet block attaches to your traveller with a 3/16" clevis pin.
The upper triple is done the same way with 3 single blocks.
Don't forget to install something on the lower to tie off the sheet to, an eye strap above the ratchet thumbwheel or brackets for a pin (as shown).
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