J.D. Vacey

The Missing Link – Addressing Roof Ponding by Designing with an HVAC Perspective

J.D. Vacey

As discussed in last month’s article, “Addressing the Roof Truss Design Note: 'Provide adequate drainage to prevent water ponding.’,” by Frank Woeste and Scott Coffman, ponding is an issue not always addressed adequately. Ponding is a design issue, a mishap, or an...

#11235 Cover image
February 2019
Issue #11235
Page 44
Frank Woeste. P.E.

All Things Wood: Addressing the Roof Truss Design Note: “Provide adequate drainage to prevent water ponding.”

Frank Woeste

The purpose of this article to examine the significance and implementation of a typical note that appears on metal plate connected roof-truss drawings when a top-chord-pitch of ¼:12 or less is specified by the Construction Documents. Three questions will be addressed: What is the...

#11234 Cover image
January 2019
Issue #11234
Page 46
Frank Woeste. P.E.

All Things Wood: Truss Lumber: Checking the Moisture Content

Frank Woeste

The lack of attention to the moisture content (MC) of lumber used in truss manufacturing can cause or contribute to in-service performance issues. Mr. Glenn Traylor’s fine article in the September issue of The Advertiser, “Does Your Lumber Have a Shelf Life?”, was greatly...

#10231 Cover image
October 2018
Issue #10231
Page 80
Glenn Traylor

Does Your Lumber Have a Shelf Life?

Glenn Traylor

Just like some foods, lumber kept in the right environment will store for an indefinite length of time. But just like food, lumber kept in sub-par conditions will have a shortened storage period. If you’re not storing your lumber properly, you may have to question whether it can/should...

#10230 Cover image
September 2018
Issue #10230
Page 32
Glenn Traylor

How Many Times Can You Press in a Truss Plate?

Glenn Traylor

The answer might surprise you. During the course of fabricating trusses, on occasion a plate is not completely pressed. As the truss comes out of the finish roller or hydraulic press, the plate sometimes does not get pressed all the way. Sometimes the plate is missed or removed and up plated....

#10217 Cover image
August 2017
Issue #10217
Page 28

Accommodating Truss Movement (Besides Vertical Deflection)

Kelly Sias

Vertical deflection resulting from live and dead loads – of both roof and floor framing components – is an important serviceability consideration in the overall design of the building. And while this could be a topic in and of itself, this article is instead going to focus on two...

#10217 Cover image
August 2017
Issue #10217
Page 82
Frank Woeste. P.E.

All Things Wood: A Common-Sense Design to Create Durable Overhangs

Frank Woeste

Decay, or wood rot, requires three conditions to be present: liquid water, oxygen, and a favorable temperature (generally between 35 and 100 degrees F). Of the three, the only factor that can be managed by building design is liquid water. Hence, overhangs of sufficient width are critical to...

#10214 Cover image
May 2017
Issue #10214
Page 66

Treated Lumber and Trusses (and the One Condition Under Which MPC Wood Trusses Shouldn’t Be Used)

Kelly Sias

What do a chicken house, a water treatment plant and a raised wood floor system all have in common? Very likely, they all involve preservative-treated lumber. They’re also all examples of common environments in which preservative-treated, metal-plate-connected (MPC) wood trusses may be...

#10214 Cover image
May 2017
Issue #10214
Page 76
Frank Woeste. P.E.

All Things Wood: Impact of Sustained Elevated Temperature on Wood

Frank Woeste

Unlike solid-sawn lumber, the mechanical properties of some materials are greatly affected by ambient temperatures and solar-radiation heating, as depicted by the photograph. However, while the engineering design properties of solid-sawn lumber are not affected by ambient temperatures, they can...

#10212 Cover image
March 2017
Issue #10212
Page 66
Stan Sias

Question of the Day: Trusses and Pressure Treated Lumber

Stan Sias

The phone rang this morning and the caller said that “they had a real quick question.” They went on to ask if “standard truss plates could be used with pressure treated lumber?” Hmmmm…the questions that some questions prompt. It sort of reminds me of the...

#09198 Cover image
January 2016
Issue #09198
Page 4

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