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Can anyone recommend a really good masonry design manual that incorporates The 2007 CBC or 2006 IBC, seismic design? I've got the ACI 530-05, the old SEAOC Bluebook and the old CMA manual based on the UBC.

Spats, I reviewed your earlier post. I think your probably right. Are you saying fibermesh won't help mitigate the shrinkage cracking? If so, why?

Thanks InDepth, Your advise has been helpful. I think I'll recommend finding an expert in this field for the corrosion investigation and mitigation. I lack the expertise.

Thanks JAE. I'll look into it. Do you mean the already rusted bars will continue to rust at greater rate? Or do you mean the bars above the column will rust quicker? I'm sure they have some rust on them even if not connected to the problem rust below. I think my epoxy coated bars will be...

spats, I agree. I'd still used the steel, but add fibermesh. I guess you'll never know if you don't try it. If the 7" slab isn't cracked, does it make sense that the 3" slab is cracked due to lifting? The stiffer panel will be under more stress, correct?

Hokie, A slab on grade or on another slab has restraint, right? It can crack from lots of things: restrained shrinkage, deflection, restrained thermal deflection (like a slab in the hot sun that arches then gets pushed down with a heavier slab). The point is fibermesh allows more tensile...

Got it. Thanks

Calculor1, Did anyone suggest fibermesh? I don't care what you do, it's gonna crack (especially a thin slab). At least the fibermesh will help eliminate large noticeable cracks. Is the panel very tall compared to its width? That generally will cause horizontal shrinkage cracks.

Replacing the column would be tough because of all the pipes hanging from the ceiling. 'Turns out there are no plans or calcs. to be found. The project engineer said there was a water intrusion problem about 20 years ago. There are no visible signs like stains on the block walls. I think the...

InDepth, By preping the surfaces, do you mean acid etch & bonder? I've alerted the original engineer via e-mail. If this were my project, I'd want to know about it. I'll wait for his response. Either way, this has been a learning experience. Migrating corrosion inhibitor and anode pucks...

Thanks to all of you for your input. I'll go back and take a closer look. I'll find a concrete repair company. I'll call the original engineer if possible to confirm the loads. It's definitely going to take epoxy rebar & some kind of seal at he ground level. I don't think the soil is...

Hokie, No, I don't have a photo. The damaged area has vertical cracking, bulging & spawling outside the rebar. The ties are rusted through and broken. The verticle bars,(6)#8's anf (6) #6 ftg. dowels, are really bad. It's like peeling bark off a tree. It's pretty hammered. I think the...

A client needs to fix a failing concrete column. The problem is corrosion. It appears that moisture from a very humid indoor environment has started corrosion from the bottom and is working its way up the column. The bottom 18" of reinf. is severely corroded, allowing the column to crush and...