Thanks Canwest.
Regarding your response 1. When you add rotational springs, would you calculate the existing rotational stiffness provided by the vertical springs and provide the deficit with your single spring? Is that what the Harden paper focuses on?
I'm trying to use Staad.pro to calculate the frequency of a foundation I'm designing, and am using ACI 351.3 as a guide for calculating equivalent springs at the base of the footing.
Calculating the impedance at the base for the various conditions is fairly straightforward, but I have a few...
As some of you may know, there is an immense difference between the costs of rebound/Schmidt hammers claiming to be 'original' or 'official' (such as those branded as Proseq) and those sold under more generic brand names.
Does our collective group have any experience using either/both types...
I just want to take a moment to thank everybody who contributed to this thread. There is a LOT of food for thought here and this will surely impact our approach to the wording in the report and the information we provide. If anything interesting comes of this, I'll be sure to update the...
BFstr,
I'd rather not share any pictures as to limit chance of identification.
The building is a slapped together old mining mill way out in the middle of nowhere. Minimal seismic, but decent snow loads.
I'm not as familiar with ACI as I am with CSA, but if the member is meant to act like a 'beam' (horizontally oriented flexural member spanning between supports) I believe it should be detailed as one.
I think external bracing is probably the way to go. One side is inaccessible so it'll have to be rigid, but a small price to pay, and one the demo contractor will be thankful to hear of in advance anyway.
I have no doubt that this is how it's working, but it was certainly not meant to by design.
I can see the ends of the bracing that was cut. In one location they left half of it lying against the equipment they installed. In another, you can see from when the building was built a note written...
