Dimension versus Dimensional
I design structures. I am an engineer. In this day and age we design buildings so that they don’t fail; don’t fall down, and, in a sense, just barely don’t fall down. Seldom do we `overbuild’. And as such, it’s …
Tag: wood
Board Foot Measure (BFM)
We had a windstorm recently … some big trees down. After cutting up most of the fallen ones on my property (taking a couple weeks), I started in on one of my neighbor’s. One of `em is a big oak. …
AITC 119 and EEEE
I was doing some reading in AITC 119 Standard Specifications for Structural Glued Laminated Timbers of Hardwood Species, Section 4.1.6 … “ … modulus of elasticity, E, values herein are the average values … The modulus of elasticity of wood …
Code Based Conventional Roof Framing (SST Course)
I recently viewed a Course on the Simpson Strong-Tie Learning website titled `Code Requirements for Conventionally Framed Roofs. Good stuff! Kudos to Randy (`Author’). Per the Course, `Conventional Framed … ‘ means `Prescriptive’ framing, or, framing that does not require …
Code Based Conventional Roof Framing (SST Course) Read more »
Cantilever Post Deflection (Post and Bracket)
Let’s look at a post, say in a shop, or a barn, acting as a vertical cantilever. This means that the base of the post is held rigid (not allowed to rotate), while a lateral (horizontal, or sideways) load is …
6 x 6 sawn post vs 3-ply 2 x 6
6 x 6 wood post versus 3-ply 2 x 6 © Jeff R. Filler, May 2022, Pell City (DRAFT) If you are an a professional engineer providing designs (or fixes) for wood-frame construction, sooner or later you will be asked, …
Shear Deflection – Prefab Wood I-Joist
Shear Deflection – Prefab Wood I-Joist Example Calc (c) Jeff R. Filler, Pell City, 2022 Continuing our discussion on shear deflection of wood beams (joists, etc.), let’s look at a prefabricated wood I-joists. Basic design information for prefabricated wood I-joists …
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 …
Accuracy of Deflection Calcs (and Eee)
In the example above (link) we calculated a deflection of 0.599 in. How accurate is this number? (I showed it to three significant figures … accurate to half a percent?) Leaving out, for now, the accuracy/precision of the other input, …
E app (Apparent Modulus of Elasticity)
E app (`Eee app’, `Eee apparent’, Apparent Modulus of Elasticity) is a design property for wood construction. It comes from the Modulus of Elasticity of the wood (E, MOE, Young’s Modulus). It’s not a `true’, or `pure’ property, and it …