18 76 6 Kickback .7 Letter from the Publisher.14 Woodshop: Moisture Content .18 Ramps for the Handicapped.42 Tools in Use: Moist
Publisher: Gary M. Katz garyk@thisiscarpentry.com managing editor: Tristan Katz tristank@thisiscarpentry.com art director/layout
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8 I am a contractor/carpenter in Seattle and just read my first edition of THISisCarpentry! Wow! Thanks for the great Saturday m
9 Looking forward to the next issue. ~ Keith Mathewson Just what I wanted. 28 years a carpenter over here and still learning. Gr
Great information and tips. This was my second time seeing Mr. Katz and I will go again and again. • fred burgers, help around t
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L ike carpentry, life is an evolutionary process—hopefully the techniques we learned last ware is fun and fancy, but an online m
Additionally, all departments, like New & Cool Reviews and Designing Class, will be categorized, making everything easier to fin
M understanding Moisture content & Wood Movement A Carpenter's Guide by Carl Hagstrom & Gene Wengert Send your Wood Shop ideas t
… expected movement can be accurately predicted and potenial problems can be avoided. WOOd MOve M e nt— YOu can’t stOp It Wood i
20 MC is exposed to 25% RH, the wood will dry to 5% MC (and shrink as it dries). The EMC helps us understand the response wood w
21 There are six key areas finish carpenters should be aware of when it comes to wood movement. WI dtH Of Mate rIal The wider th
22 sawn. Quarter sawn lumber has annular rings that are oriented between 45 and 90 degrees to the board's face. Flat sawn grain
23 the material when you receive or install it, and to know the EMC where the wood is to be installed. Moisture content is measu
24 ate 1/4 in. The formula for calculating wood movement is complex and extremely accurate, but tedious. One simple rule of thum
25 applI e d fI n IsH dOes nOt stOp MOve M e nt While it's true a high quality finish will slow the rate of moisture exchange, i
26 assuming an area is protected from the weather. In most cases, you can deal with material that's a couple of points high, but
27 ing the material into a heated, low RH area. The amount will depend on the temperature and humidity of the storage area. The
28 Humidity in un-heated areas fluctuates about 10%; therefore dry material (6% MC to 8% MC) installed in unheated areas will sw
29 a 24 in. wide panel will shrink and swell four times as much as a 6 in. board. But what about a series of boards installed si
30 If the material in non-glued assemblies (flooring, for example) is installed "tight", and there's no gap to absorb expansion
31 flooring is delivered at 8% MC. The width of the room is 12 feet, and the floor acclimates to a high level of 11% MC, the cum
32 winters may be more humid than the summers!). But basing your door gap on the time of year you hang the door can be a mistake
33 stiles will drop to 6%, and the door can easily shrink 3/16 in. Knowing the MC at the time of installation provides the neede
34 the detail to the right is one method used for cabinet batten doors that successfully allows for seasonal wood movement.
35 Doors with Horizontal Battens Unless you're setup to build these doors properly, avoid them. The typical horizontal batten do
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37 contracts. Instead, use a breadboard nosing design so that the wide panel can shrink or swell without destroying the surround
38 cOM MOn MYtHs Wood is Stable at Below Freezing Temperatures. the moisture in wood is chemically bound in the walls of the woo
39 bIO: carl HagstrOM Carl Hagstrom is a partner in WOODWEB.com, the leading on-line resource for professional woodworking, and
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Volunteer work: good for the community and good for the soul by P H otos by Larry Haun Don bLom
44 One of my first memories, in the early 1930s when I was 4 or 5 years old, was of our mother taking care of a neighbor, Eula H
45 weather worn boards. No one had money to buy real materials. The nails used to fasten boards together came from a burned out
46 soak up some sunshine, or even go to the medical clinic or the grocery store when they want to. Being able to get out of our
47 why the disabilities act is so important to wheelchair bound people. Americans with disabilities, according to Wikipedia, are
48
49 was a well-built ramp, but we knew that there was no need to build a permanent one. She used it for about three years before
50 fOllOW YOu r bu I ldI ng cOde Rules for building a safe and stable ramp vary some from state to state and also from city to c
51 ties Act), the maximum slope of a ramp cannot exceed 1 in. for every 12 in. of run. So if a ramp needs to rise 14 in. to the
52 it concerns maximum rise and maximum run. According to the guidelines, “If the slope of a ramp is between 1:12 and 1:16, the
53 ber that comes in 4 ft. multiples. This way we create less material waste. ADA guidelines require level landings at the top a
54 And finally, ramps need to be stable, firm, and slip resistant. Here in wet, coastal Oregon, we use pressure treated, rot-res
55 Also, it is recommended that you wear gloves when working with this material. That’s a good idea considering that chemicals o
56 bu I ldI ng tH e u ppe r lan dI ng The landing can be ½ in. lower than the level of the house floor. If you are using 2x boar
57
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59 The landing is just a basic square or rectangle built level with joists to carry the deck sheathing. For a 60 in. x 60 in. la
60 For our 4 ft. wide ramp, I use three joists attached to the landing by metal hangers or pressure blocks (solid blocking betwe
61 ramp, I notch in additional 4x4s to support the joists and handrail. When the landing happens to be on concrete or asphalt, I
62 l Or u sHape d raM ps Sometimes, because of space limitations, a ramp has to change directions or double back on itself. To m
63 mer, and the boards are dry (that’s rare for Oregon!), I leave about a ¼ in. gap between the boards to allow room for expansi
64 raI lI ngs I use 2x6 or 2x8 stock for the bottom curb that keeps a wheel from slipping over the side. This stock is cut to le
65
66 we run a roundover bit on all the upper edges—that’s a quick way to clean up rough boards and eliminate splinters. When neces
67 vets returning from a bloody war. They wanted to settle down, find a job, and raise a family. Build houses we did, row after
68 Loading Video Ramps for the Handicapped
69 helping others by building Habitat houses for people who otherwise could never dream of owning their own home, by doing hospi
70 straight out of the blue. Not a great matter for you maybe, but I wanted to know: Why am I here? What’s my purpose on this br
71 I started at the university. I became a carpenter, a navy man, a teacher, a husband, a father, a gardener, a writer. But the
nO trees we packagi shipping Straight from the publisher to the reader.
ere cut. ing. g. Subscribe now for a chance to win a stabila ld 400 laser measure ! FREE! SubScribe to thiS iS carpentry
Contractors prefer Kleer for its consistent quality, workability and warranty. KLEEr PVC TrIMBoarDS… • come with a Lifetime Warr
A Moisture Meters by Greg Burnet s carpenters, we’ve been known to invest heavily in tools that make our jobs easier and more ef
Moisture content varies dramatically. if you don't know the moisture content of the material you're installing, you're working i
78 Wood flooring installers have been using moisture meters for years. Many will check not only the MC (moisture content) of the
79 well as any lumber taken from an outside source such as a lumberyard, another jobsite, etc. In short, any material in your fi
80 should probably plan on spending at least $125 and up to acquire a good quality instrument. Pinless moisture meters typically
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82 lumber such as logs and timber. This method is very accurate, which is why these are usually the tools of choice for commerci
83 4 in. into the wood. to get an accurate reading on thicker material, the pins must penh to the reading on pg. 81. this pressu
84 using pinless technology. If more accuracy is required, it also functions as a pin-type meter, thanks to the probes incorpora
85 els from Lignomat, I was pleased to discover that the more recent entries from this manufacturer also make selecting the spec
86 havoc on the fresh wood (especially if the backside of the material hasn’t been sealed). these displays share with LED displa
87 if a bargain basement model would perform well enough that I could recommend it as an option to those who simply can’t or don
88 the craft and continues to learn more everyday by visiting historic homes, reading and researching books on architecture, and
89 English Sheepdog, Lola. Someday Greg hopes to find more time to devote to his hobby—trains. He’s both a model railroader (tho
A pin type Moisture Meters for Wood A Second Opinion by Howard Brickman s a hardwood flooring installer, I have been using wood
Therefore, the best method for determining MC is to perform an "Oven Test" by weighing the piece of wood then placing it in the
92 The pins don't give accurate MC readings in end grain. The surface of the wood needs to be dry. A wet surface will give an er
93 different species, add another potential source for errors: it’s easy to set the meter for the wrong species, and it’s even e
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