what are the chances?
In a previous post (here), we determined the size glulam roof beam required to not deflect more than 1.00 inches (under design load). We arrived first at a size 6.75 in. x 27 in., but it was not quite sufficient. …
Tag: safety
Ex min or Ey min
This will probably be my shortest post. … In the determination of wood beam stability (lateral torsional buckling) with respect to bending about the X-X axis, use Ey min (not Ex min). The context here is structural glued laminated timber …
E min and `Never’
I continue to be mesmerized by this thing called `E min’. E min is the `minimum modulus of elasticity’ used in stability calculations in wood engineering design. E min (hereafter just Emin) is based on `regular’ modulus of elasticity, E. …
floor (joist) vibration
Other than a project or two where I looked at vibration from machinery, I never worried too much about vibration in floor / floor framing design. Typically, I never had to. Manufacturers of floor joists (e.g., prefabricated wood I-joists) worry …
Jamming Jack Studs
The nice thing about a stiff beam is that it won’t sag much. The not-so-nice thing is that it won’t `give’. In new construction, wood framing more or less starts from the ground up; wood members are placed on top …
Veeeee
V (pronounced `Veeee’, in wood engineering, in any particular usage, generally stands for one of two things. As pertaining to loads and forces in (inside of) wood structural members themselves, V stands for `Shear’, in particular `horizontal shear’, and specifically …
The 50-Year Wind
Okay, let’s say I’m gonna build a `shop’ near, say, Moscow (Latah County), Idaho, Zip 83843. The big worries there are snow, in winter, and wind, any time of year. For wind, let’s go to https://hazards.atcouncil.org, … `Wind’, and then …
Differential Displacements and the SST SDPW Deflector Screw
Differential Deflections … and the Simpson Strong-Tie Strong-Drive® SDPW Deflector Screw (c) Jeff R. Filler, May 2022, Pell City, AL I haven’t tried one out yet … the Simpson Strong-Tie Strong-Drive® SDPW Deflector Screw … but the idea is fascinating …
Differential Displacements and the SST SDPW Deflector Screw Read more »
E min
E min (c) Jeff R. Filler, Pell City, Alabama, 2022 But First, E apparent and E true `E min’ is calculated wood property used in the design of structural wood members (beams, columns, etc.). It is a derived property, derived …
`Eeee’
E (Eeee!) (Steel for now; wood later) E stands for Modulus of Elasticity, or Elastic Modulus, also Young’s Modulus. It is also abbreviated MOE (`Em – Oh – Ee’). By definition it is the amount of stress (tensile or compression) …