no comments or why are you doing it that way's? *lol*
ahh, alright.. well this is going on a concrete slab so no floor joists to worry about :laughing:If you want the free end extremely strong---cut a hole in the floor as large as the double 2x4 end---extend that through the hole and attach it firmly to the floor joists----some cross blocking might be required if the joists are not right where you want them---
As to the origin of that 'Let IN'----that's an old term describing cutting in a brace --English I believe --been in use for several hundred years--