A few techniques (Definition: a trick used more than once).  My usual way is to use a coupler to tie together two pipe clamps.  Sometimes, method #6

 

 

Full article: https://www.woodmagazine.com/tool-reviews/clamp-beyond-your-clamp-capacity?hid=b0b455ea13e71c23a3fc22b044c0be06fb838bd1&did=16070138-20250109&utm_campaign=wood-online_newsletter&utm_source=wood&utm_medium=email&utm_content=010925&lctg=b0b455ea13e71c23a3fc22b044c0be06fb838bd1&lr_input=054cc015b57d54e1680d1a6048482c50e9b71e5448ad337fc319f7f4f4e52672&lr_input=054cc015b57d54e1680d1a6048482c50e9b71e5448ad337fc319f7f4f4e52672

I do the same thing for pipe clamps. Have a bunch of couplers hanging on the clamp rank. A few years ago, I was lucky enough to win some Bessey parallel jaw clamps. They came with Bessey's couplers.  I've used #6 for trigger clamps, too.

Got a bunch of Jorgensen 3/4 pipe clamps. Most are 4' with a couple at 6'. There's one 8 footer with 1/2" pipe. It's useless as that small diameter bends easily over a decent span. It's unlikely that I'll have a use for any of them as my larger project days are likely over. They just hang on the wall, taking up space. 

I had to fix a trestle table once.  It had lapped dovetails in the leg structure and they didn't quite fit.  My guess was that parts got mixed up somewhere between the factory and the warehouse.  I chiseled out so the dovetails fit.  Then  I had to strap two clamps together to pull the tenons into the 8' stretch of the base.