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  • Users: KootK
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  1. KootK

    Moment Frame on Asphalt / Wheels?

    I've got a client who wants a temporary lifting frame that would bear on asphalt at the column bases. Do I need to consider the column bases as though they are on rollers? Or am I being excessively paranoid? I'm not sure that I have a friction coefficient for this case that I trust. The...
  2. KootK

    One Drive - Am I the Last Person Using Dropbox for Business

    Just a poll here. Is everybody using OneDrive for cloud collaboration with clients? I'm still rocking Dropbox just because I was an early adopter and I detest change in all of its myriad forms. And my personal & business files are not as separate as they probably ought to be... But, lately...
  3. KootK

    Misadventures in Rubber Stamping

    Obviously, it is a dangerous thing to admit to rubber stamping on this forum. Many members here feel that no version of rubber stamping is acceptable. They will want to chastise me and quote a whole bunch of state regulations justifying their stance. And I encourage that to some degree. That...
  4. KootK

    Guide to the Design of Common Irregularities in Buildings

    Anybody had a chance to review this publication yet? On the one hand, I long ago committed myself to reading anything that Sabelli deigned to author. One the other hand, $300USD for the cheapest option is like $7.3B Canadian at the moment. It would need to be good. Is this rocking anybody's...
  5. KootK

    Ethics Double Check

    The situation: 1) I have a contractor client that accounts for 5%-10% of my annual revenue. 2) This contractor did some work on a property and, in the course of that work, may have done some inadvertent damage to the structure. This is the property owner's claim. The contractor doesn't...
  6. KootK

    Roofing Fastening Detail - Loads and General Critique

    I'm hoping to evaluate the uplift capacity on the re-roofing detail shown below. I don't have a great depth of experience in this space and could use some bounce. Feel free to answer any of the questions below with no obligation to answer them all. US / Canadian / Other Places answers...
  7. KootK

    Scanning Pile Rebar From the Top

    I've got some piles that were constructed without being inspected. Some testing was done to confirm the pile depth but I'm being told that it is not possible to scan the rebar from the top of the pile in order to ascertain at least the rebar circle (right side sketch below). Is is problematic...
  8. KootK

    Tie-in BTW Concrete Basement Wall (N) and Wood Basement Wall (E)

    Basement walls made of wood studs are a thing that happen here. Yeah, I know... Anyhow, I've got a condition where an addition with concrete basement walls is to tie-into one of these wood basement wall things. I struggle to figure out what to do here with respect to differential settlement...
  9. KootK

    IStructE Design Guide on Transfer Slab Design - Free (At Least for Now)

    THE SHORT Check out this free (for now) design guide on transfer slabs: Download Link. This is a topic of interest to many of us here so I thought it prudent to share. THE LONG A while back, member @Trenno brought it to my attention that IStructE was doing a webinar on the design of transfer...
  10. KootK

    Typical Electrical Load Expected for Precast Parking Structure

    I'm structural but I'm being asked to ballpark the electrical load required for a parking structure that I'm involved with. Anybody able to provide some numbers on a per square foot basis etc for something like that? The scale of the structure will be similar to that shown below. Pretty small.
  11. KootK

    Small Parallelogram Parking Structure Feasible in Precast?

    I'm doing a feasibility study on a small parking garage: - 200' x 200'-ish. - Two levels above grade. - A rectangle if possible, a parallelogram if not. - Coastal, high seismic (I'm not worried about this part). - Precast TT and spandrel if the numbers make sense, mildly reinforced CIP if not...
  12. KootK

    PSA - Forest Products Laboratory Design Guide - Durable Solutions for Balconies and Decks

    This just came to my attention and is free and rather excellent: Link. Published May 2023. This is Eng-Tips after all. Good references are like currently 'round these parts. After the zombie apocalypse, structural engineers will probably be running around trying to trade hard copy NEHRP...
  13. KootK

    Free Concrete Anchorage Resource

    A colleague just shared this document with me which is freely available to all: Link. It's a research report on anchorage based on work done at the University of Alberta. We discuss anchorage issues at length here so I thought that others might appreciate a peak at something relatively state...
  14. KootK

    Field Welding Non-Weldable Rebar

    Context - Grade beam on a local infrastructure project. It supports a fence that keeps sabre toothed tigers from eating babies. Low importance factor as with most livestock stuff. - An unfortunate core has been made through the grade beam top reinforcing. - Various constraints are making it...
  15. KootK

    Rain Damage at Top of Augured CIP Pile.

    PARAMETERS - Helping out with a field issue on someone else's design. - Augured CIP piers for a pickleball screen wall fence thing. Seriously. Part solid, part chain link. - Contractor allowed heavy rain to fall on the tops of the piers 60 min after casting. - Ridiculously windy location...
  16. KootK

    Burying Steel Beams in Wood Stud Wall Volumes

    I've got an architect wanting to hide some 30' steel beams inside a 2x6 stud wall system. This tends to restrict the pool off off the shelf W-beams that would be workable. In what can only be described as an egregious tactical blunder, I mouthed off that even a 5.5" beam flange cannot be...
  17. KootK

    Seismic Forces Above Grade ARE "Real" - The Mea Culpa

    1.0 INTRODUCTION 1) Like Jon Snow, I know nothing. You've been warned. 2) This is going to be a multi post thread setup, TLDR be damned. To that end, I ask that nobody respond until I've made it clear that I'm done with the initial setup. For some time now on this forum, I have been...
  18. KootK

    Soliciting Opinions on the Duerr Crane / Gantry Books

    Every so often I hear good things about Duerr's books. This isn't space that I spend much time in so I don't really "need" these books per se. That said, when a brilliant and practical engineer puts pen to paper, I tend to enjoy the result -- and take useful things from it -- whether it's my...
  19. KootK

    How to Support Our Smalltime Software Developers - THE KOOTMARKET

    TLDR I believe that the future of structural engineering software is this spit: a) Some big dog(s) create general purpose FEM engines that are I/O accessible in standardized ways by external, 3rd party applications. b) A bunch of small dogs create 3rd party applications that access the...
  20. KootK

    The Cost Premium for WT vs WF Steel Members

    I want to know the cost premium associated with ordering WT versus WF. For example, if one 30' long W18x35 beam cost me $100, what would it cost me to order two 30' long WT9x17.5? $105? $150? Someone must know. I need this for several things at the moment including this thread: Link...

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