Glenn Traylor

What is Camber and Why is It Important?

Glenn Traylor

In the truss industry, camber refers to the gradual curvature of a chord member either naturally occurring or created to alleviate the natural deflection of a truss structure. That sounds simple enough, but there are key elements about camber that should be considered. Camber in Action All...

#16300 Cover image
July 2024
Issue #16300
Page 33
MSR Lumber Producers Council

Building Confidence: Understanding the Technology Behind MSR Lumber

MSR Lumber Producers Council

In our October article, Because Good Ingredients Matter, we focus on the word quality and the many ways that MSR lumber has become synonymous with high quality structural building components. Having laid the groundwork for why MSR has become so important for optimizing truss designs and an...

#14281 Cover image
December 2022
Issue #14281
Page 94
MiTek Staff

Construction Loading

MiTek Staff

Per BCSI-B4 (Building Component Safety Information): The term “construction loading” is typically used to describe Loads from workers and Building materials on unfinished structure, as, for example, when builders temporarily stack bundles of panel sheathing or gypsum board on...

#14280 Cover image
November 2022
Issue #14280
Page 112
MSR Lumber Producers Council

Because Good Ingredients Matter

MSR Lumber Producers Council

Since the 1960s, fabricators have used machine stress rated (MSR) lumber of all species to improve the performance and reliability of their engineered components and structures. Nowadays, you don’t have to look far to find a successful component manufacturer who relies heavily on MSR...

#14279 Cover image
October 2022
Issue #14279
Page 90
Randy Shackelford, P.E.

Hurricane Andrew — a 30-Year-Old Learning Experience

Randy Shackelford

This August marked the 30th anniversary of the Florida landfall of Hurricane Andrew, one of the most damaging, and influential, hurricanes ever to hit the United States. Hurricane Andrew hit South Florida with Category 5 winds early on the morning of August 24, 1992. Andrew caused damages of $25...

#14279 Cover image
October 2022
Issue #14279
Page 122
David Rothweiler and Bruce Feldmann

Checking Trusses at Bearing Locations for Out-of-Plane Buckling

David Rothweiler and Bruce Feldmann

Every truss design is evaluated for numerous criteria to determine if it is structurally sound. One of those checks is the capacity of the truss to resist buckling at a bearing location. This article focuses on checking out-of-plane buckling when a truss member is loaded in compression...

#14275 Cover image
June 2022
Issue #14275
Page 72
MiTek Staff

Recommendations and Limitations for Depth and Deflection of Parallel Chord Trusses

MiTek Staff

In addition to allowable lumber stress limitations, parallel chord truss designs are also regulated by maximum permissible deflection-to-span and depth-to-span limitations. All of the following recommended limitations should be achieved to provide a quality roof / floor system and assure...

#14271 Cover image
February 2022
Issue #14271
Page 105
Yoonhwak Kim, PE

Important Check Points for a Truss Design Drawing

Yoonhwak Kim

A Truss Design Drawing (TDD) includes specific information[1] for structural engineers and building designers: truss profile, plates, loadings, wind speed, codes, enclosure, exposure, reactions, deflections, materials, bracing, bearings, etc. The maximum reactions are the most important values...

#14270 Cover image
January 2022
Issue #14270
Page 102
Linda Brown

All Things Wood: Machine Graded Lumber: Technologies, Quality, and Benefits

Linda Brown

For more than 70 years, people have been using machines to assist in the grading of lumber. This article summarizes the machine grading methodologies for producing Machine Stress Rated Lumber (MSR) and Machine Evaluated Lumber (MEL) and highlights the similarities and differences between MSR and...

#13263 Cover image
June 2021
Issue #13263
Page 80
Glenn Traylor

Compression or Tension Web Configuration—Which is Better?

Glenn Traylor

On a recent Quality Assurance Audit at a large facility, we witnessed a floor truss builder carefully spacing out his floor truss webs in the allotted space available with precision and care. He was very meticulous. I asked him why he was doing that and he explained that his in-house inspector...

#11240 Cover image
July 2019
Issue #11240
Page 32
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