It's referencing additions AND alterations. Removing 40' of building would be an alteration so the section still applies.
You are removing LRFS in the longitudinal direction also right? Your capacity in that direction may decrease faster than your demand decreases (especially if you have few...
You need to demonstrate compliance with Exception 2 AND 3.
I assume you are removing elements of the LFRS to do this. If your LFRS elements are equally spaced this may not be an issue, if they are more concentrated at one end you may be increasing loading to certain elements. A plan layout...
What a mess the threaded rods are going at an angle through the beam? How far away is the next wide flange? I'd probably make them re-hang this, something similar to the duct trapeze, image below, with a small channel or even a double strut for vertical support to the next beam.
Cable sway...
SOG would fall under ACI 360 and there is a section in ACI 360 for WWF.
The quote references plain WWF not being recognized for ACI 318 for structural slabs. Different documents.
Around here it is very common to callout a wood truss as a drag truss on the type of commercial/institutional projects I work on. I just note the magnitude of the demand on the plans by the truss. When I get the truss shop dwgs I can check if they actually add the load to it.
I thought my contribution was very useful. Your questions are very basic and non-technical indicating you have limited knowledge of the construction method and the design method. I didn't say it can't be done just that you are probably out of your area of expertise and should seek the advice...
Fixed ends or not you'd need a very deep beam, probably a plate girder would be more appropriate and constructable. Instead my approach would be a regular pinned end steel truss with cord splices so it can be transported. Depth would be dictated by deflection. The more difficult thing to get...
1. The horizontal mortar joint is the bed joint. The vertical mortar joint is the head joint.
2. Not to my knowledge.
3. Why do you think that?
4. Drilling into mortar joints would only require a masonry/concrete bit...
5. Not to my knowledge because it's not allowed by the mfr. because...
For sistering you can calculate the shear flow and required nailing to ensure they work compositely. I frequently do this for strengthening existing members for new mech units.
Point H is moving 0.45" because the software treats it as pinned-roller. Actual horizontal deflection will be split between the top of the right and left walls (0.45"/2). The movement at the peak will be rotation not translation and will be due to this top of wall deflection. The real world...
Sketch a section and we might be able to understand what's going on. Also, what's a "box frame"?
It kind of looks like you have a short bearing wall above the 2x10's which would act a bearing line for your 2x4 roof framing. If that's the case yes I've seen this before. The ceiling framing...
