not sure i have your question right, is this a P-delta query, but there are definetly lateral deflection limits for wind both for the overall building l/400, and storey drift limits of l/500 and additional requirements with regards to notational loads to consider erection tolerances and out of...
Masonry always screws up the l/360 assumption as being the 'Smallest' deflection under LL permitted. All these deflection criteria are based on limiting crack apperances in finishes, read masonry in this case, or human perception read sloping floors etc., and vibration. Agree with IFRs if the...
Well the point is I suspect you should be reviewing the 'components' that go into your design to see that they conform to your assumptions and if as 'rlewistx' has correctly pointed out, you have assumed something that is is physically or practically not possible, then you should review this...
sorry back, stupid viruses. We have an internet dedicated computer, firewalls, latestest and greatest anti-virus, live update etc., etc., but still ...
so yes ishvaag concur totally on structure vs. member however do need to consider individual member and effects large deformations can have on...
Where displacements are small and gross distortions to the geometry of the structure don't apply it can be reasonable assumed that the equilibrium equations based on original directions and positions of the external forces and the members are still valid. Where this may not be the case then the...
At the end of the day everybodies in the soup if theres a problem and the courts will partition damages, which if your the 'Engineer of Record' I suggest will be considerable. So Shop Drawings bearing the seal of a Prof. Engineer are a good thing, dwgs. should detail all required connections...
Try ASCE Paper No. 3269 'Wind Forces on Structures', a Swiss Paper, much referenced (See SEI/ASCE 7-02 C6-36 the english interpretation in ASCE paper above)and still to this day in the codes, is used. In the swiss paper 1956, are open walled roof only structures and their pressure...
Boy i sure like the last post after all the pontificating. Imagine that 'Built-up sections' calculating section properties as though all one, and the finally how to connect it all so that it is one. The problem is more than one of geometry and the connection issue is surely more challenging...
yes on the hairpin thingy to transfer horizontal load from the pinned connected base of the rigid frame into the floor slab???, yes we have used to use this technique with many 'Pre-Engineered Buildings', always had trouble with that term, we could probably start a thread on that alone...
Fascinating question. Ultimate Limit States vs. Serviceability Limit States. Well definitely one will govern the design solution. L/360 (LL only) type criteria is a gross over simplification. Vibration, dynamic loads (read lateral), storey drift, P-Delta, differential settlement, compatibilty...
If you've designed full momemt connections and the fabricator/supplier of the steel has bid on the work based on that then thats what shoud be supplied. period.... (bunch of them). changinging your analysis requires redesign all the way down to the bottom of the foundation. Connections are...
We have some precast concrete cloumns in which the existing column base plates have experienced various degrees of corrosion/rust. The existing base plate is plate steel anchored and cast into the column base. Would like to weld a new base plate to the existing base plate, core out the...
sorry been abit busy, the beam in question is part of a gerber grirder cantilever/drop in span system, somewhat, so to speak, in any case it has a couple of support conditions depending upon location in building, either a simple beam, or a continuous beam pinned connected at one end and...
RG88
yes suspect this was the most simple way to add 'Section' due to existing physical constraints.
yes questioning first off the 'massive' reinforcing, seeing it is visually stunning, but from an analysis point of view yes questioning the ability of the welds to transfer shear and the overall...
