I've read a 2018 and a 2019 thread, which were both helpful, BUT... did not touch what I've been wondering since my curiosity originated over a decade or two ago.
In general wood frame commercial and multi-family residential construction, I frequently specify that supporting shoulders of...
I've been asked to design an ALUMINUM cross-over ladder "structure", with bar-grate platform.
In over 30 years, I've never "done" ALUMINUM!
Where do I obtain Design Values for Aluminum?
Is there a "PROPER" ASTM I should comply with? B308-6061-T6? 4047? 2026? The 6-page 6061-T6 "Standard...
ForteWeb TJI Software by Weyerhauser
For decades, I understood that TJI's, in general, do not require Bottom Edge Lateral Bracing throughout the span(s), even at mid-span.
The Weyerhauser website states... Trus Joist® TJI® joists are made with no observable twist and have minimal material...
Top Running Single Girder Crane
(1) Bridge, (1) End Truck (each end of bridge), (2) 13K Wheel Loads at (1) End Truck, (2) Wheel Loads on (1)/(Each) Runway
Lateral Loads are 20% of wheel loads = 0.2 x 13K = 2.6K Lateral Load
Logitudinal Loads are 10% of wheel loads = 0.1 x 13K = 1.3K...
RE: Installation of F1554 Grade 36 (or other) Threaded Rod & "Epoxy" / "Adhesive" in Concrete Masonry Horizontal Bed Joints and Vertical Head Joints.
1. Is “Head” and “Bed” Joint the/a correct/familiar terminology?
2. CAN we drill and install threaded rod with HILTI/DeWALT/Simpson/etc...
I draw (mostly) everything in Model Space.
I only use Paper Space when preparing viewports for plotting.
When in model space, although rarely, sometimes, when I zoom in, the screen turns white! then I can't see my sursor or crosshairs.
WHY?
Is there a toggle or other command to prevent or...
The General Contractor wants to fasten OSB roof sheathing to Steel Wide Flanges or HSS with HILTI PAF pins rather than the specified TEK-5 screws.
Genreally, HILTI pins are for fastening light gage steel to the thicker base material, such that, the fastened material is thin, or of gage...
Has anyone specified or used Gator Bar?
With the current rising prices of steel, our primary General Contractor is inquiring about the use of Gator Bar, a Fiber-Reinforced Polymer (FRP) Rebar for use as mesh in flatwork and horizontal rebar in non-load bearing frost walls and footings...
If there is a more appropriate forum, please let me know.
Adobe Acrobat Pro DC - "this.flattenPages()" doesn't work.
Does anyone have experience with this?
Please advise...
Thank you!
Excel Spreadsheet
Microsoft Office Standard 2010
Within the following formula, I want the red portion to appear red if the applicable conditions apply.
=IF(F35<F24,(IF(F34<F24,"Plate must be wider than beam flange >>>","Actual / Specified Plate Width =")),"Actual / Specified Plate Width")...
Footing size 18' x 18' x 36" thick. 36 yards of concrete. 4 Trucks.
What special concerns or limitations should be considered when pouring a 36" thick concrete footing when considering heat of hydration?
Fly ash? Pozzolan?
Since I do not want the liability of concrete composition, do I...
Please see attached AISI Table C2.1-1
The building is using 5/8" exterior sheathing over CFS studs.
The AISI Table C2.1-1 doesn't have values for 5/8" sheathing.
It's obvious that 5/8" is stronger than 15/32 or 7/16. But, since that IS the case, why wouldn't the table either give values for...
Upon reviewing masonry submittals, I notice that the Compliance Test Results for Concrete Masonry Unit Compressive Strength of 2,225 psi exceeds the specified requirement of 1,900 psi. However, the Compliance Test Results for Mortar of 1,140 psi is less than the 1,900 psi for the concrete...
Cold-Formed Steel Stud Shearwalls
RE: AISI S213-07/S1-09 (2012) Tables C2.1-1 & C2.1-3
I see an allowance to specify 33, 43, 54 & 68 mil or 20, 18, 16 & 14 Gage respectively, as well as an allowance to specify #8 & #10 (TEK) Screws.
On other CD's I've seen specifications for 97 mil 12 Gage as...
I've reviewed the 2014 Eng-Tips post entitled "OSHA Fall Arrest System".
There is apparent debate, indecision and, unless I do not understand, no apparent credible conclusion regarding what load must be applied to the structure supporting Fall Protection "Systems".
Lanyards... 5,000 LBS...
I've searched AISC-SCM-13th and internet.
AISC provides generic, basic information, but, no definitive safety factor for any application. Perhaps I'm missing something.
Internet, as you might guess, provides MANY safety factors for various applications.
What I need is a credible resource...
Where can I find Wind Shear Capacity Tables for Structural Wood Panels on CF Steel Stud Walls?
I'm also interested in 3.5:1 or 4:1 Aspect Ratios.
Through internet search, I'm coming up with "last-resort" possibilities, but, I would rather have something AISI or other reputable organization...
ANSI / AF&PA Special Design Provisions for Wind & Seismic (SDPWS), Table 4.2.4, gives Maximum Diaphragm Aspect Ratios. Being AF&PA, this table is applicable to wood only.
Is there a similar Table, Reference, Rule of Thumb or other Aspect Ratio Guidelines for Steel Deck on Steel Joists?
Thank you!
Please see attached...
Could ACI be considered "empirical" and therefore, could I over-rule it by providing supporting engineering data of my intent?
The general contractor wants to omit the #4 x 16" x 32" bent slab dowel at top of wall and post-install a straight bar with epoxy.
Since the...
Is there a "rule of thumb" or guideline to preliminarily, determine OWSJ (Open Web Steel Joist) girder or joist width?
I always need to contact the joist vendor, who will then contact a potential engineer, who will then give, understandably, only an approximation.
I thought I stumbled upon a...
