Grapevine over a crumbling pergola.

We have a thriving old grapevine which grows up and over a very old trellis/pergola, which has two sides and a 'roof'. It's gradually falling to bits and needs replacing, but I don't want to kill the grapevine. I understand you can't prune them much either. Any suggestions as to how I can replace the wooden structure without damaging the vine?

 

Can you make a strut like a scaffold tower for the grape vine to lean on while you replace the pergola? Pruning the grapevine at this time of year will probably bleed to death, hard pruning is for winter

 

Thanks, could try that.

 

Personally I'd do the job next winter, but if you have to do it now you can prune any new growth, if fact it will help the fruiting.
Just dont cut into any brown wood.

 

Excellent thanks. Yes I’ll wait till winter then prune it a little, then try the scaffold idea to support it . There’s a Russian Vine growing through it so I’ll need to get rid of that at the same time, blimey does it grow!!