After lifting a car via pinch weld, hearing a pop, and seeing it bend slightly I became nervous about setting a jack stands using them without any additional support. Thanks to the magic of the internet I got this idea from a car forum: cheap hockey pucks ($1.99/ea at DICK’s) with slots cut in them. The pinch weld is placed in the slot and the jack stand supports the heavy rubber puck which braces the frame rail.
These were cut by laying a 1cm strip of masking tape on the top of each puck, making a vertical cut with a hacksaw, then an angled cut to meet the vertical. The wedge of rubber was then encouraged out of the slot with a flat blade screwdriver and cleaned up as needed. Fairly simple and only about 20 minutes of work after acquiring the pucks.