Bed rail size for T Slot Nuts

T-slot twist nuts for bed rails? t slot bed rails rails on top of the bed A plate with vertical square rails is bolted to T the anchorman slot Jagdeep Cast Iron T-Slotted bed Plates Floor Plates are made of Grey Iron Casting from FG200 to FG300 confirming to IS:210 Casting shall be stree relieved

three kingdoms slot And if the spoilboard is made of strips that sit between the rails, does a baseboard under that add any value? To save 1000 words, here's the