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“Standard” Wood Domino Dimensions

Wood dominos (walnut, cherry, hickory, maple)

For Christmas, I decided my daughter needed a bunch of dominos (not to play the game dominos, but to stand up and knock over). I always liked playing with dominos, but was always disappointed when I ran out, so I then decided it should be a big bunch of dominos. After doing a little on-line research, I quickly concluded that a purchase of a big bunch of dominos, even the cheap ones, was going to add up, and since I have a never-ending supply of domino stock in my shop, I set out to make them.

First things first, I needed to figure out the dimensions, and this ended up being the most difficult part of the entire job. I tried searching online, assuming there would be a standard size and I would just copy that, but I didn’t find anything standard. The sizes seemed to be all over the place. Then I thought, “OK, maybe there isn’t a standard size, but there must be some sort of standard ratio or proportions to a domino.” But, as far as I can tell there isn’t, or at least there isn’t anything clearly published that is quick and easy to find. There was nothing with the heading “Standard Domino Sizes,” like I was hoping to find.

Here’s the good news, after scouring the internet for information and making a few hundred myself, I have finally figured out the perfect proportions for what I am calling a standard domino. Now, it seems quite simple and very obvious, but it took me awhile to put it all together (we had to knock over a lot dominos for it to click). The dimension that took some time to nail down was the thickness.

At first, I just guessed at it and made the dominos a thickness that looked in proportion to the length and width. After using the dominos though, it seemed like they were a bit too thick. They look fine and don’t feel unlike a domino, but they don’t fall over very well. They still fall, but they are just a bit too stable and don’t fall with much force. They aren’t bad enough to throw away, but they could be better.

After playing with the dominos more and making structures with them, similar to building blocks, it all came into focus, and I found the magic ratio. When we stacked  the dominos in different orientations, things weren’t lining up and the thickness was to blame. We would stack some dominos on their side, some standing, and some laying down, and the ones laying down didn’t quite line up with the ones on their side. It was close, but not that close. Three dominos laying down were just a bit taller than just one on its side, which made them impossible to use as stable building structure. If they were just a bit thinner, everything would line up when they were stacked and they would topple just right.

So, here is the magic ratio, expressed in a three different ways:

Thickness = X, Width = 3X, Length = 6X

Width = X, Length = 2X, Thickness = X/3

or in actual (standard?) size

Length = 2″, Width = 1″, Thickness = .33″

Standard Domino Dimensions

Of course, if you are going to make your own dominos, they don’t have to be 1″ wide. They could be any dimension you want, but be sure to follow the above ratios for them to really work well.

How Thick to Cut Lumber

One of the first things I needed to figure out when I started cutting rough lumber on a sawmill was what thickness to make it. I could generally determine if I wanted it to be thick or thin, but just how thick or thin? 4/4 lumber is 1″ thick, so it should be rough cut at 1″ thick, right? Not exactly. For hardwoods, the commercial target for 4/4 lumber is actually 1-1/8″, which allows enough margin to produce dried and planed lumber at a thickness of 13/16″ or 3/4″ (3/4″ is acceptable, but the extra 1/16″ of thickness in 13/16″ material allows room for additional planing or sanding after panels or doors are glued up).

The crazy thing is that back then I couldn’t find solid information on lumber thicknesses anywhere and when I referred to the NHLA (National Hardwood Lumber Association) guide, the thicknesses didn’t match up with what I was finding from hardwood producers.  The NHLA guide doesn’t include the bonus 1/8″ of thickness – 4/4 lumber, for example, is specified at a minimum of 1″.

In my experience, 4/4 hardwood lumber cut at 1″ is too thin to consistently produce flattened and planed lumber at 13/16″ thick and will even have trouble producing 3/4″ thick unless the boards are very flat. The only way 1″ thick rough-cut hardwood lumber can plane out completely to 13/16″ or 3/4″  thick is to skip the flattening and just plane the lumber. This will produce thicker finished lumber, but it won’t be flat and straight since the planer will simply follow the curves of any crooked boards. From a woodworkers perspective this is a horrible practice and makes woodworking much more difficult. For this reason, I cut my 4/4 hardwood lumber like all other quality producers at 1-1/8″ thick and don’t accept anything from other sawmills or wholesalers at 1″ thick.

Starting with the lumber measurement and adding 1/8″ for the final thickness is how all of the hardwood measurements go, with a target for 4/4 lumber at 1-1/8″, 5/4 lumber at 1-3/8″, 6/4 at 1-5/8″ and 8/4 at 2-1/8″. These are the commercially accepted numbers, and except for 8/4 lumber the ones that I shoot for. The problem with 8/4 lumber is that since there is more wood it shrinks more than thinner lumber and 2-1/8″ thick just isn’t enough thickness to flatten and plane lumber to consistently finish at 1-3/4″, which is the target for 8/4 lumber. When I flatten and plane batches of 8/4 lumber milled at 2-1/8″ thick it isn’t uncommon for half of the lumber to finish at 1-5/8″ thick instead of 1-3/4″.

Because I think 2-1/8″ is a little thin, I commonly cut 8/4 lumber at 2-3/8″ thick. 2-3/8″ thick is twice that of 4/4 lumber, plus the 1/8″ saw kerf that would have been between the two imaginary cuts. The extra thickness not only impresses the ladies, but it assures a final dried and planed thickness of at least 1-3/4″ and officially uses no extra wood when compared to cutting 4/4 lumber (to keep things simple, a friend of mine simply calls it “double four quarter” lumber). As I mentioned though, 8/4 is commercially sawn at 2-1/8″ thick, so if you cut it at that measurement it isn’t wrong, 2-3/8″ is just better for the end user (none of my customers have ever been upset that the wood is a little thicker).

The previous examples were for hardwoods, but softwoods, like white pine, can be cut thinner since they shrink less and dry straighter overall, plus softwoods are commonly used for construction purposes instead of furniture, which don’t need the extra thickness for secondary planing or sanding, so 3/4″ final thickness is common for 4/4 softwood lumber. For 4/4 white pine for example, I cut 1″ thick, which will finish at 3/4″. And, for cedar, which shrinks very little and is very straight and stable, I will go even thinner, down to 7/8″. In general though, softwoods are cut on the standard quarter scale with 4/4 lumber measuring 1″.

The scale below shows the target hardwood lumber thicknesses for commercially produced, rough-cut lumber and their planed thickness counterparts. These are the sizes you should expect to find when shopping for hardwoods.

Hardwood Lumber Measurements

Quarter-scale measurement    Rough cut thickness    Planed thickness
4/4                                                1-1/8″                            13/16″
5/4                                                1-3/8″                            1-1/16″
6/4                                                1-5/8″                            1-1/4″
8/4                                                2-1/8″ (or 2-3/8″*)         1-3/4″

*2-3/8″ is a better thickness to consistently finish at 1-3/4″ thick, but 2-1/8″ is the norm.

Siberian Elm Live Edge Slab Table Top #1

I have been cutting a lot of slabs lately and building a lot of tops. This is the first one that I have finished out of a big double-crotch Siberian elm that I milled in the spring. The top is 36″ at the narrowest and 58″ at the widest. The slab was milled 3″ thick and was flattened and finished with a hand-planed surface at 2″ thick.

For those of you that haven’t heard yet, Siberian elm is one of my favorites. The wood needs nothing added to it to make it beautiful – just a clear top coat (actually four coats of Klearvar) is all it takes. The wood for this top is a delicious medium brown with tons of visual interest, especially where the main trunk splits into three branches.

The wood slab and the steel base (built by Commercial Fabrication) are going to serve as a 42″ bar-height community table in my customers newly remodeled basement.

The first of several Siberian elm slabs to get finished.

The first of several Siberian elm slabs to get finished.

 

A closer look shows all of the character of Siberian elm.

A little bit of finish and a closer look shows the character of Siberian elm.

 

Siberian elm log being processed on Lucas mill with slabbing attachment for logs up to 64" wide.

Siberian elm log being processed on the Lucas mill with slabbing attachment for logs up to 64″ wide.

 

Freshly milled Siberian elm slabs

Freshly milled Siberian elm slabs.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

First Hollow Sycamore Slice Gets Finished and Installed

I have been on a sycamore kick lately, and this sycamore slice keeps my streak going. There are three stacks of these rough sawn slices for sale in my shop, and though I have sold a few, this is the first one to officially get finished and installed.

Luckily the house had a perfect niche for this 48" diameter hollow sycamore log slice.

Luckily the house had a perfect niche for this 48″ diameter hollow sycamore log slice.

The slice is 3″ thick and is a cross cut of a 48″ diameter hollow sycamore log that had the added benefit of having a long open wound that didn’t quite seal up. In the tree’s attempt to close the wound the new wood took on a curl shape on both ends that make the slice look more like an artistic expression than just a hollow log.

Since the tree was standing dead all of the sapwood is consistently spalted and marbled in appearance. There is some solid heartwood in the piece which isn’t spalted, but has a beautiful rust color.

I was planning on ditching this tree since it was hollow and didn’t seem to have any millable lumber in it, but when I saw the curl shape on the inside of the log I did a u-turn on my way to the dump. Solid logs with complete centers that are sliced like this tend to crack and fall apart because of the drying stresses in the log, but in this case all of the drying stresses were relieved since the center was gone. When the outside wood wanted to shrink it wasn’t restricted by wood on the inside and could freely reduce in diameter without any problems.

I installed the slice on the wall with two lag screws, just like a mantel. I drilled matching holes on the back of the wood and just slid it on the wall (with the help of my customer). This system works great since it allows the piece to get flush to the wall and enables it to be removed without tools should the need arise.

Overall, I am ecstatic to have one of these completed and out the door. Next up is to finish at least one extra to keep in the shop to show off. You wouldn’t believe how much faster they sell with a finished sample around to seal the deal.

The Best Outdoor Wood Finish

Cetol Door & Window can be found under a new line name of ProLuxe by Sikkens. It retails for about $70 per gallon.

Cetol Door & Window can be found under a new line name of ProLuxe by Sikkens. It retails for about $70 per gallon.

I often get asked, “What can I put on wood that will protect it outside?” My follow-up question is, “Do you want a finish that builds up to a film or just something that soaks in, like an oil?” If the answer is a film finish, I recommend Cetol Door & Window, from the Sikkens Proluxe line of wood finishes. It holds up better than any other outdoor finish that I have used, and every painter that I know and trust uses it too. I have found Cetol to last almost twice as long as the next class of film finishes.

In my teenage years, I tried regular ol’ Minwax polyurethane on the wood bed of my restored ’63 Chevy pickup truck, and I couldn’t believe how fast it started to peel. One St. Louis summer of constant heat and sun made it look like it had a bad sunburn with lots of dead skin.

After that, I moved on to other products like spar urethanes (Minwax also makes one of those, called Helmsman’s). Yes, it lasted longer, but not LONG. It started to look bad after a little more than a year. It didn’t totally fail all at once, but enough areas were falling apart that it didn’t really matter – it just looked bad.

In defense of these two products, the bed of a pickup truck is a tough environment. It gets direct sun, extra heat with no breeze, and the surface is horizontal, so water has a much better chance of nosing its way under the finish. It really gets no more demanding than this for a wood finish.

With yearly maintenance, the spar urethane could be kept looking reasonably good, but eventually the maintenance gave way to submission and the weather won. The boards still looked alright (nothing rotted through), but there were always spots where the finish failed and the beautiful clear-coated lumber had cracked finish and gray spots of raw wood.

It wasn’t until much later that I was introduced to the Sikkens brand name from a friend in the St. Louis Woodworkers Guild. He had great things to say about their products, and then I started noticing them being used by different painters on different jobs around town – and consistently. Nobody was using anything else, at least not anyone that I trusted, so I started using them.

Originally, Cetol only came in various forms with added stain. Some of the colors were pretty light, but none were clear. I believe the color is added to help with UV protection, but it does nothing to help color matching or achieving a clear finish. Now, with the name change to Proluxe, a colorless version is available, and it is the one that I use.

The can says that Cetol should be applied with a brush and not rolled or sprayed. I haven’t rolled it, but I have brushed and sprayed it, and both worked fine. Spraying is more difficult, and probably not recommended by the company, because the Cetol has a long working time and tends to sag if applied too liberally. That same working time is great for brushing and allows large areas to be worked and reworked to blend brush strokes. If you do try to spray it, start with a light application and allow it to settle for a second so you can get a feel for how it is going to sit down. Keeping a wet edge isn’t critical because it doesn’t even start to get tacky for a long time and the following passes will easily blend together. If you do spray the Cetol be vigilant about finding areas that start to sag or run and simply blend them in with a brush.

Cetol, like many other finishes, takes three coats to build a good protective barrier. A fourth coat will add a bit of extra protection, but isn’t required. I would opt to skip the fourth coat on the initial application and put that energy to a maintenance coat later down the road.

Regular maintenance is critical to keep the finish from failing. Keep an eye out for areas that start to crack and get another coat on as soon as they appear. If you wait too long it will be necessary to completely strip the finish and start over.

Cetol should last for several years without maintenance on vertical surfaces and even more if they are protected from the sun. Horizontal surfaces in the sun will probably last a maximum of two years before they require attention. Both of these time-span numbers are not great, but they are at least twice as long as the spar urethanes. If you jump around the internet and read about other choices or recommendations from other woodworkers, you won’t find anything that lasts longer.

Unfortunately, three years is really the maximum for an outdoor clear finish with sun exposure. Of course, if you know of a finish that lasts longer please let all of us know about it. But, do watch out because the world will beat a path to your (long-lasting, clear-coated wood) door.

 

 

How to Install a Wood Fireplace Mantel (Mantle)

The call usually goes like this. A potential new customer calls and says, “I am looking for a mantel. The stone guys are coming tomorrow, and I need something today so they can put it in. Can you cut me a mantel?”

The answer, of course, is yes. However, I spend a little time calming them down and explaining that they are going to mount the mantel after the stone work is done, how it will come out beautifully and how not having a mantel right now won’t slow anything down.

Most people expect that the wood is going to be embedded in the stone, which is the reason for all of the last-minute, frantic calls, but I argue that the wood should not be surrounded by stone, mostly because of wood movement and not because of the fact that they don’t have any wood to surround with stone.

This mantel was milled from a piece of driftwood and the fresh cuts were stained to match the gray exterior.

Install solid wood mantels in front of the stone. Don’t leave a void or do anything different to the stone. 

All wood, dry or wet, moves with seasonal changes and the stone does not. This means cracks will develop around the mantel over time. They will be small, perhaps unnoticeable, around dry wood, but if the wood is newly sawn and installed wet, the cracks will be unsightly after the wood has dried and shrunk. The other possibility is that green wood could bow, twist, or warp in some fashion and blow things apart. If a 8″ x 11″ x 8′ long piece of white oak decides to move aggressively, there may be little that can stop it and the results could be catastrophic. It is definitely possible that any stone or brick veneer could be popped from the wall when the wood starts moving.

So, I say, don’t fight it. Don’t try to put the stone around the wood. Let the stone guys do their thing, step back, take a deep breath and then find a cool piece of wood to install in front of the stone.

The method I recommend works for installing any solid wood mantel above any fireplace, from drywall to stone and anywhere in between, and the process is quite simple.

Besides your tools and the actual piece of wood for the mantel (purchased, of course, from WunderWoods) you will only need 5-minute epoxy and two steel stakes. I get the steel stakes at Home Depot in the concrete supply aisle. They are 5/8″ thick steel stakes used for concrete forms and they are very sturdy. Do not use rebar because it is too flexible.

You might be thinking that just two steel rods aren’t enough and be inclined to use more, but don’t, unless it is absolutely necessary. Two 5/8″ thick stakes can easily hold 200 pounds (which I usually verify with a modified one-handed pinky pull up in which my knees stay on the ground), and I have found that even with more than two stakes, the heavy lifting is usually done with just two, while the others are just along for the ride. And, since the extra stakes just make for more drilling and more chances for things to not line up, I say don’t use them. If you feel that you need to beef things up, just get bigger steel rods.

The basic premise of this method is that you are installing two shelf brackets in the form of steel rods that will support the mantel which will have two holes drilled in the back to accept the rods, all of which will be hidden.

Start by determining the mantel location and then finding suitable places to install the rods. The rods need to be mounted solidly, either through the wood framing or through the stone, or both if possible, and close to each end of the mantel. Usually the exact locations are determined by the stone or framing layout.

Drill the holes in the fireplace surround with a 5/8″ masonry bit and a hammer drill in stone or brick, or a 11/16″ bit and a regular drill in wood. The 5/8″ bit in stone will usually leave a hole with enough room for level adjustment because the hammer drill makes a roomier entrance. Since wood drills easily and with a cleaner hole, the 11/16″ bit is required to allow for level adjustments.

Drilling holes for mantel rods

Drill a hole in the fireplace surround for the metal stakes.

Next, you will need to drill 1″ diameter holes as deep as possible in the back of the mantel that line up with the rods (be careful not to drill all of the way through). I usually just measure for the locations, but if you are worried about messing things up, you can make a drilling template to use on the wall and the back of the mantel. This still doesn’t eliminate screw-ups (nothing does) because it is easy to flip the template when you should have flopped it. Be sure to mark your template with top, bottom, left and right sides, and don’t forget to mark the side that faces the mantel and the one that faces the wall.

Drilling mantel for rods

Drill 1″ holes in the back of the mantel. Use a square to keep the drill bit lined up.

Next insert a steel stake into each hole and secure it with 5-minute epoxy. Be sure to fill in the front and back for full support. While the epoxy is setting check the rods for level and adjust as necessary. I often add some small wedges to help hold things level while the epoxy is setting up. After the epoxy is set up, trim the rods to the final length which is determined by the depth of the holes in the back of the mantel.

Fill the hole and cover the steel stake with epoxy to make sure it is fully supported.

Fill the hole and cover the steel stake with epoxy to make sure it is fully supported.

Site across both stakes to make sure they are parallel with each other.

Site across both stakes to make sure they are parallel with each other.

In a perfect world you would slide on the mantel and be done at this point, but it is rarely the case – often you will need to make some small adjustments to compensate for drilling by hand. If the mantel doesn’t sit level it can be adjusted by adding wraps of tape to the metal stakes, either near the front or back, depending on which needs to be raised.

Use wraps of tape to make level adjustments to steel stakes.

Use wraps of tape to make level adjustments to steel stakes.

Once you have the mantel sitting level you are done. Don’t worry about gluing it on – it isn’t necessary and will only make the mantel more difficult to remove if you need to work on it in the future.

The finished product.

The finished product.

 

Walnut Bell Frame

Recently a customer called to talk to me about a woodworking project and asked if I have ever built a bell frame. I told him, “No, but I am pretty sure that no one else you are going to find around here has either.” That may not have instilled much confidence, but I got the job anyway (it may have also helped that he was a friend of a friend).

My customer gave the bell to his wife for their anniversary. It was made in 1908 and weighs about 450 lbs. The bell and the new headstock and wheel all came from Whitechapel bell foundry in England, makers of Big Ben and the Liberty Bell.

The frame is made of walnut, which is very durable outside, and is mounted on a slab of granite from New Hampshire. I was able to get all of the major parts from one log that was perfectly suited for the job. It was straight-grained on one end, which I used for the feet and top rails, and it was curved on the other end, which I used for the four legs. I loved using the sawmill to cut the thick lumber and chainsaw to do the rough work.

One of the most enjoyable parts of this job was being able to start with a log, and in a short time end up with a finished piece.

Walnut bell frame

Walnut bell frame 2

 

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