I am looking at a reinforced concrete building from the 1940's. The drawings indicate Fs = 20 ksi. Until we have the rebar tested, I planned to use Fy = 30 ksi to run preliminary numbers to estimate the loads this building can carry.
Does anyone have experience with rebar of this vintage...
A new bank facialty will contain a pre-fabricated precast vault 18 ft x 75 ft, with a precast concrete lid.
The supplier of the vault says they don't engineer them and they cannot provide a review letter from a structural engineer. They use the same panels and just rearrange them to fit their...
I'm working on a reinforced concrete pedestrian/service tunnel located under a street to connect the basements of two exisitng buildings. The tunnel is 350 long, 15' wide, 15' tall. The floor of the tunnel is 18" thick, T & B reinforcement, primary load is hydrostatic uplift, as the tunnel is...
According to IBC, in-plant special inspections are required for shop fabricated load bearing members. For load-bearing prestressed precast concrete, PCI Certification generally allows exemption from independant special inspections in-plant.
Is there any other quality certification that would...
Is it ever OK to rely ONLY on friction to resist base shear?
Specifically - precast load bearing wall panels providing the lateral force resisting system where the base shear is taken out in friction on plactic bearing strips? By my interpretation, ACI 16.5.1.4 says no.
I am working on conversion of a one story warehouse structure into an elementary school. What started with supporting new RTU's now requires that we upgrade the building to current code (IBC 2006). The original construction was under BOCA - no seismic design required at all. The code upgrade...
