We are proud to announce the completion of the design-build restoration to a building recently damaged by a neighbor’s fire.
The client took the opportunity, since much of the roof structure was damaged, to replace the entire roof with four-ply built-up roof system. Six skylights were replaced and two were added, increasing the natural light throughout the warehouse. Additionally, a self-flashing galvanized steel roof access hatch was installed.
This is a close up of the panel that is bowed out (rebar melted during fire) and was replaced.
Bowed concrete panel
The exterior of this building was damaged by a fire in the neighbor's yard. A structural engineer determined one panel needed to be replaced entirely.
Framing for the panels on the casting slab.
The rebar and pickup and brace points are being wired into the framing of the two concrete tilt-up panels.
Rebar & Points
The tilt-up panels are being poured together. After the concrete cures for the first seven days, they can be raised and put into place.
Concrete panel pour.
The panels have been poured and need to cure.
Curing for 7 days.
Screenshot from the damaged panel drop video taken by our client. It goes down faster than another one is raised.
A crane raises the panels and moves them into place.
The crane raises the panels off of the casting slab by its pickup points and puts it into place with help from men inside using guide wires.
Raising the panel
The second tilt up panel is raised and put into place.
Raising second concrete panel.
The second panel is put into place and both panels are made plumb and secured with the brace bars.
Putting panels into place.
The two panels that replaced the one damaged panel are now ready to be sacked and painted.
Ready for paint.
New CMU wall and two new panels (with higher parapet wall by City Code) are finished.
CMU and concrete panels
A 3-ton heat pump unit was replaced and it was relocated onto a factory curb to minimize leak potential.
During reroofing is the best time for a volunteer seismic retrofit of the building and that is precisely what our client opted for. We also replaced the tilt-up panel that had been compromised structurally (it bowed outward) with two new concrete tilt-up panels.
Does your concrete tilt-up building have cracks? Are those cracks simply cosmetic? Is it just chipped paint? Chances are, it’s not.
Because both concrete and the earth tend to move, concrete tilt-up panels will develop cracks.
These cracks are not merely at the surface.
They are not cosmetic.
Rather, they crack through the entire thickness of the wall panel. Thus the mnemonic: “cookies crumble, concrete cracks.” We call them “through-wall cracks.”
What are through-wall cracks?
Through-wall cracks not only compromise the structural integrity of a building but they’re a neon sign advertising water intrusion. And we know that’s not a good thing, right? Epoxy Injection is a Structural Repair.
“What this does is welds the concrete back together, protects the rebar that’s running across the cracks, and waterproofs the building for water intrusion.” Art Dodge
This weld is a structural repair. Once the epoxy is cured its strength is 15,000 pounds per square inch (psi). In fact, the weld is stronger than the concrete was originally. What will epoxy injection do to my building?
I interviewed Art Dodge of Dodge Concrete Waterproofing Surfaces about the steps involved to structurally repair these cracks with epoxy injection.
This entry was posted in
Educational, Industry News and tagged concrete, concrete panel, Dodge Waterproofing, epoxy injection, epoxy injections, orange county general contractor, panel cracks, Riggins Construction, structural repair, tilt-up building, waterproofing on . May 14, 2012