Thank you for the responses. It is a two pile group and the axis of the pile group is the axis of the moment. It is a new column in an addition up against an existing building.
One thing I did not take into consideration when posting the original thread is the compressive force in the cap...
CRSI Pile Cap Design Guide, Figure 4.3 shows minimum pile embedment and a distance to the bottom reinforcing in the pile cap. The distance to the reinforcing places it above the top of the pile. If the loading on the cap is eccentric to the pile or pile group, there will be a moment in the...
If new beams are introduced to an existing composite floor system, how are the design of the new beams and verification of existing handled? How does the introduction of the new non-composite beams affect the existing composite members?
In the paper "Evaluation and Modification of Open-Web Steel Joists and Joist Girders" (Broekmeier and Fisher), the authors account for the stresses that exist in the members due to dead load if the member is not shored when reinforcing takes place. Yet in their discussions on the welds, in...
For rough finished formed concrete surfaces, is their an accepted or specified standard on when the defect should be patched? All I could find in ACI 347 was patch the defects and tie holes. They address knocking down the fins greater than 1/2", but nothing on the size of defects that should...
waytsh - being an old f**t, I would use ASD, but the young engineer working on it will probably use LRFD. The discussion was whether you could use the load combination which includes 0.75 Live (putting the crane load here) when combined with the snow and other loads.
We are aware of the...
Existing structure has bridge cranes suspended from the roof structure (joists). In looking at this to evaluate the joists would you consider the crane load a roof live load (Lr) or could it be considered as a live load (L)?
Reference also the definitions of the two in the ICC building codes...
Our specs for welding structural steel (buildings) have historically called for the use of E70 electrodes. Recently a contractor has requested the use of E60 for some A36 material citing "matching strength criteria". A little research reveals this is not a new concept. What are other firms...
Not sure this is the proper place to post. In Ohio building code there is a section that requires "wiring for operation and control" of some equipment to be protected to withstand 1000 degrees for 15 minutes. Is anyone familiar with a product that would meet this requirement or anyone in Ohio...
As a young engineer we never concerned ourselves with the floor load and ite affect on the foundations, but I must admit most of that work was commercial with lightly loaded floors. As noted in original post, we are now getting into heavily loaded floor slabs that might constitute half of the...
We are beginning to get into buildings with large floor loads 500-1000 psf. When looking at this as a surcharge above footings when designing the foundations, what are people using as a reduction to the allowable soil bearing at a building column? The large surcharge loads may reduce our soil...
Thanks to all for the quick responses. As KootK noted we need to check equilibrium so we either need some bracing or we would have to make the two walls act like an angle resisting the torsion created by the eccentricity of the lateral loads. Walls are precast so a bunch of segements, don't...
