With thanks to Tassini and jimbobs and the others ...... crepitas has brought up a new question .
I had to go looking for old photos and I didn't understand how the original pillars had attached to the crossbeams .
But I can see in this picture that there are short verticals bolted to the concrete pillars.
I didn't know it had been done like that .
Can I remove those short pieces and safely replace them with 1500mm lengths ?
With a bit of bracing ?
( And the added relief for Bettyboo that the RomanoGrecEesan pillars will stay in place ? )
I think I'm addressing this mainly to jimbobs .
Wasp?