The area where I work, north of Boston, is full of old houses ripe for remodeling. It's natural for homeowners who want to update their living space to first address sagging and bouncing floors, and make sure any structural work done upstairs is solidly supported below. That was the case on the job shown here. The home's central girder had been unprofessionally shored over the years with steel posts, pressure-treated 4x4s, and even a cedar log (below). But in spite of the effort, the first-floor was still bouncy, and the spans between posts were too long. So I installed five...

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