Lomarandil: I think the test rivet was representative since the heads on all of those rivets are quite large. I am the contractor - I will remove another when we're back to strengthen the floor beam prior to jacking because I agree that a 1" rivet is unusual. AREMA does say 11 ksi which is in...
kipfoot - I'm not in St. Louis. Thanks anyway.
bridgebuster - We removed a couple rivets last week (exploratory) and replaced them with bolts. Good news is that one is 1" while the other is 7/8" as expected. The 1" works even at the more conservative allowable stress in AREMA. We may end up...
My firm has been tasked with replacing the bearings on a through-truss railroad bridge. The bridge was built in 1927 and was originally property of the Delaware and Hudson. The span is long so the jacking loads are quite high - the bridge weighs over 700 Tons. Analyzing the connections is fairly...
If it's clay soil and recent development has resulted in more wells, underdrains, or stormwater systems that could draw down the water table the settlement may not be over. If that's not the case, you're probably right and it probably won't keep moving.
Maybe learning more about the foundation...
You could run a level loop through the house to establish a base line and do it again in a couple weeks. Settlement probably happening slower than that though.
If you want to learn more about the foundation I would grab a shovel or a mini excavator and see if it does have footings, or a frost...
Black book covers both design methodologies...
The base bending equation in the spec F2-1 is applicable to both Stress and Strength design and modified accordingly (IE you either factor your loads and use strength reduction factor of 0.90 or you use service loads and reduce yield stress by...
What Ron said. You use the skidmore to calibrate your torque wrench. If you have many of these connections I would encourage the contractor to use DTI's and you check them with feeler gauge.
The PE exam is coming up on Friday and I keep stumbling on a certain problem in my practice tests.
The problem is very simple and should be easy points on the actual exam if it appears: "Given an allowable stress and a bending moment select the lightest wide flange". Cake, right? Mn=Mp=FyZx...
We have a digital copy of ACI's Manual of Concrete Practice. I am sitting for the PE in April and am compiling code. NCEES says both documents referenced in thread title are required (for Construction depth). For some reason our digital copy of SP-4 is just one sheet - it must be incomplete. ACI...
I would only backpaint an embeddment plate if it was aluminum, although I don't like embedding aluminum on principle anyway.
The alkaline nature of concrete should protect your steel in all but very caustic exposure conditions.
Mexico City has drawn down its water table over the years which is also causing settlement issues.
Sounds like a depressing place to live with no windows. Maybe they don't have egress requirements there?
If freeze thaw cycles do not occur and the other three exposure categories aren't applicable then you fall at the "0" level for each and can use a minimum f'c of 2,500 psi unless required to use a higher strength per 1.1.1 or 5.3.
