MSR Lumber

Ga Rc 2601

Question: 

In RC 2601, is RC-1 Channel used?

Mold On Lumber

Question: 

I am looking for some information regarding black surface mold on lumber. Does it alter the integrity of the lumber stress values? I have a client who wants to use “all dry” lumber for his construction but I do not know if this is really necessary.

Health Hazards Of Mold On Lumber

Question: 

What are the health hazards of black fungus on Douglas-Fir lumber?

Fire Rating For Sloped Roof Truss Assemblies

Question: 

A question has come up concerning sloped roof trusses and fire assembly ratings. Some are reluctant to rely on test results from flat (parallel chord) trusses applied to sloped roof trusses. Do you have any information regarding the suitability of the fire rated ceiling assemblies for sloped roof trusses? Does the “minimum depth” requirement of the parallel chord assembly apply to the minimum depth of a sloped roof truss (i.e., heel height?)

Post Fire Retardant Treatment

Question: 

Is a Class A fire rating (provided by our liquid spray-on fire retardant) acceptable in certain situations?

Charring Of Trusses

Question: 

Our home caught fire last month and burned partly through a tongue and groove ceiling to the trusses. Some are charred. Our contractor did a moisture meter test. An engineer for the insurance company said the trusses were only smoke damaged & the moisture meter test is invalid (it can be set to read anything). I found one article on charred trusses, but it’s pretty vague. We do not feel safe with the insurance engineer’s assessment because some of the trusses are obviously charred. We hired an engineer who agreed with us.

Fire Rating For Truss Assemblies Built With 2x3 Lumber

Question: 

Are there any published studies or guidelines on the fire rating of floor trusses built with 2x3 lumber?

Information On Frt Roof Trusses

Question: 

I need to obtain some information on fire-retardant-treated roof trusses.

Machine Rated Lumber Makes a Lot of Cents

With MSR lumber, CMs find they can more effectively deal with lumber defects that can affect connector plate teeth embedment at critical joints.

It’s one thing to have a salesperson from an MSR producer tell you the advantages of using MSR lumber in your production process. It’s an entirely different thing—and much more persuasive—to have four veteran component manufacturers (CMs) give you the reasons they’re convinced it’s better than visually graded lumber.

Why Lumber Variability Is a Problem for CMs

ALSC’s PS 20-15 has fundamentally changed what this grade stamp represents.

Few issues have demanded the attention of the SBCA Board of Directors more over the past five years than the variability of lumber design values. SBCA Legal Counsel Kent Pagel provided guidance to component manufacturers (CMs) on ways to mitigate the potential risk and liability that have arisen in the market as a result of how the lumber industry has chosen to deal with the issue of variable design properties.