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OK dear forum members, thank you for the spirited discussion.  I will be happy to return to the forum on 23 October, yes 2020 and pick up where I left.    It is not about who is right but about what is the correct thinking behind the Tables. If I fail the exam because of this topic, so be it.   

Lb is not zero just because the compression flange is restrained from lateral displacement along the full span. It is the distance between points where both top and bottom flanges are restrained from twisting - the span, say 40 ft in a section with Lp of 10 ft. ....based on...meaning the Mp is...

14th - Table 3-6 is based on braced (Lb always < Lp, therefore not considering LTB) beams -.... If so, why are spans many times Lp listed in that table? For the same material properties, Lp is a function of section property only. Lb can be more or less than Lp. Up to Lp, Mp is constant...

Let me explain my understanding. 3-6 has plastic (yielding) up to Lp, then inelastic LT up to Lr. Up to only Lr, fully braced, you can use 3-6 (or 3-2 if selecting by Zx). LT is not confined to 3-10. 3-6 also has the linear reduction. Up to Lr, unbraced, you can use 3-10 for...

For the next two weeks regulate your mornings and afternoons to only one release each. Creature of habit will help. Don’t eat sugary snacks at least during the exam. The body likes to release excess sugar. Hydrate just enough early at lunch break. If you have to just sip as little as possible...

Verbatim from Manual: The plots include the beam weight, which should be deducted when calculating the maximum uniform load the beam will support. Cb is taken as unity. TDW, I see what you are saying but what threw me off was I was thinking of Moment. Now I see “maximum uniform load the beam...

Selecting beams using Table 3-10 requires accounting for the weight of the beam. Cb is 1.0. Simply supported beams, easy enough to take off the moment due to self weight of the beam. But if we are doing a continuous beam, and the maximum moment   includes beam’s self weight how does one deal...

Nathan, that was my wish too. But whether it is logistically more difficult to do is what I am still not sure how it is actually done. As I also said, in this day of specialization where engineers work on mostly steel and/or concrete and wood especially being a nich segment with many doing wood...

Examinees understand that they are allowed to lower masks to eat or drink for brief moments as defined by the proctors and that proctors will issue a warning to examinees before they are dismissed.   Taken from NCEES COVID do’s and don’ts. Did I read in some post here that even water is not...

tj and leggo thank you for sharing your understanding. Two graders with the third one coming in as a referee If needed is what I have read also, but the criteria for going to the third grader seems to be narrowed now, meaning it is less common now. In today’s specialization in different...

Are solutions to all 4 afternoon problems submitted by a given candidate graded by one/same grader or are they broken up and assigned to different graders depending on their expertise on the problem topic and then reassembled? They conduct workshops for the graders after an exam is administered...

Thank you daywalker and kevo. Yes, by hand at the exam. I like the humor. i kept this general because stability analysis of both steel and concrete frames run on parallel tracks. Both involve using Delta. However, the examples I have seen give the deflection-delta value rather than calculate...

Moderator, in case this post can be construed as transgressing NCEES exam integrity policy, please delete it. My intent was to see if anyone used a given method and achieved Acceptable on the problem as a whole. Nothing more.

What is recommended method to calculate first order Delta and acceptable for the exam? 

Please delete the first para. I was rearranging and expanding the paragraphs. In so doing forgot to delete it.

Omega is the ratio of base shear at initiation of failure mechanism to the design base shear in a structural system. It is a measure of the reserve capacity of an entire  structure to resist MCE acceleration. Values of Omega are tabulated by systems, not elements. Rho is a 30% penalty for lack...

Old post. New member. So let me see. I don't see any issue with the NCEES solution in this case. Areas - Net is used for strength calcs, Average is used for stiffness, deflection. Net area is used in the first portion of the allowable load equation - axial compressive strength only.  Average...

Old post, but new forum member, so let me see. If the schematics and proportions are correct, this is an eccentrically loaded case. At the column/wall interface, there would be a moment in the stem wall equal to column load times eccentricity. If this is a pin connection, can there be strain...

New kid on the Forum. Saw this. Yes, this is a bit shaky ground, pardon the pun. I will give my understanding. Applies only to SDC - D thru F. Rho is 1.3, 1.0 under exceptions. Omega is minimum 2. Certain components of a structure such as collectors, connections, foundations, cantilever column...

Joined recently. Saw this. I beg to differ. Key is cast against and permanently exposed to earth vs exposed to earth or weather. The former needs 3 “. Applies to walls, vertical cuts etc. The latter needs 2” or 1 1/2” depending on bar size and applies to slabs on ground (placed on, not...