girder – Wood Engineering

`E005′

By WoodEngineering Posted on November 13, 2024 Posted in Uncategorized Tagged with beam, beam deflection, beam stability, coefficient of variation, COV, E app, E ave, E min, E true, E005, E05, Emin, girder, glued laminated timber, glulam, lateral stability, lateral support, lateral torsional buckling, lumber, modulus of elasticity, probability of occurrence, roof load, sawn lumber, snow load, structural collapse, structural stability, timber beam, unsupported beam, visually graded, volume factor, Z statistic

In an earlier post (here) we looked at the probability of occurrence of some wood products ending up out in the field … say, in buildings, having actual modulus of elasticity values equal to (as low as) the values used …

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AITC 119 and EEEE

By WoodEngineering Posted on March 26, 2024 Posted in Uncategorized Tagged with AITC, AITC 119, AWC, beam, building, code, coefficient of variation, construction, COV, deflection, design, E, engineered, engineering, girder, glued laminated timber, glulam, hardwood, header, joist, modulus of elasticity, PLIB, stiffness, wood

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 …

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Deflections of Wood Beams

By WoodEngineering Posted on June 21, 2023 Posted in Uncategorized Tagged with allowable, beam, bend, bending, bent, bow, code, construction, creep, dead, deflected, deflection, design check, elastic, force, girder, immediate, joist, limit, live, load, long term, occupancy, occupant, permanent, rafter, sag, shape, short term, sustained, weight, wind

When we examine deflections of wood members (beams, joists, rafters, girders, etc.) we generally look at two kinds, actually three … the deflection due to the `live load’, e.g., people walking on a floor, wind on a wall, and so …

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Differential Displacements and the SST SDPW Deflector Screw

By WoodEngineering Posted on May 2, 2022 Posted in Uncategorized Tagged with allow, allowable, bearing, code, collapse, crack, cracking, deflection, deflector, design, differential, displacement, floor, girder, gypsum, IBC, inspect, joist, load, movement, rafter, roof, safe, safety, sag, screw, snow, SST, Strong-Tie, townhouse, truss

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 …

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E min

By WoodEngineering Posted on April 1, 2022 Posted in Uncategorized Tagged with apparent, beam, bend, collapse, column, COV, COV E, deflect, deflection, design, deviation, E, E app, E min, E true, girder, glued laminated timber, glulam, grade, joist, laminated, lateral torsional buckling, LTB, lumber, modulus of elasticity, MOE, NDS, post, rafter, reference, rupture, safety, sag, sawn, serviceability, shear, shear fee, sort, species, stability, standard, standard deviation, Supplement, variability, wood, Young’s modulus

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 …

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E app (Apparent Modulus of Elasticity)

By WoodEngineering Posted on March 31, 2022 Posted in Uncategorized Tagged with apparent, beam, bend, bending, bounce, column, composite, concentrated, deflection, deform, design, E, E app, E min, E true, elasticity, G, Gere, girder, glulam, I-joist, joist, load, lumber, materials, mechanics, Mechanics of Materials, modulus, moment of inertia, national, National Design Specification, NDS, plane, plank, post, prefab, rotate, safe, sag, sawn, SCL, shear, simple, specification, stability, strain, stress, structural, Supplement, true, variability, wood, Wood Handbook (WH), Young’s modulus

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 …

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Rafter Bearing and Anchorage

By WoodEngineering Posted on September 16, 2021 Posted in Uncategorized Tagged with beam, bearing, framing, girder, header, rafter, roof, slant nail, support, toenail

Rafter Bearing and Anchorage … So, of course, the rafters need to `bear’ on (be supported by) something. For Linda’s Goat Barn the rafters will rest on `headers’. The design of the barn, remember, is `pole barn’, e.g., rafters supported …

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dead load deflection

By WoodEngineering Posted on July 7, 2021 Posted in Uncategorized Tagged with beam, creep, dead, deflection, girder, joist, load, rafter, weight

Jeff R. Filler, (c) 2021 The dead weight deflection of a beam, rafter, etc. is the amount the beam deflects, bends, sags, due to the `dead weight’ of the things it is carrying, including itself. Going back to the example …

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… rafter deflection!

By WoodEngineering Posted on July 7, 2021 Posted in Uncategorized Tagged with beam, concentrated, deflection, girder, header, load, rafter, sag, serviceability, stiffness

… now for `deflection’ … So far we’ve been dodging the `deflection’ issue. `Deflection’ of a beam, rafter, girder, header … is how much the beam `bows’, or bends. For a beam or rafter supported at it’s ends, the deflection …

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Tag: girder