Hi guy's
I need to close the gaps here on each side by around 30mm for the grate to sit on firmly just in case someone walks on it (just so it is strong enough to hold firmly)
I found 20mm plastic spacers but so Bunnings sell 30mm ones?
Saves me from joining multiple together
Or if anyone has an alternative that won't get damaged by small amounts of water
Drain is under a pergola so this would only be used when we wash the floor with hose etc


