It's not an example of shrinkflation because the reason for setting the standard at 1.5" x 3.5" was a government imposed standard and not due to cost cutting. So you could have a lumber manufacturer whose 2" x 4"s were 1.5" x 3.5" as they are today, or you could have a lumber manufacturer who dried their cants as larger planks and then cut them down to the exact dimensions. The drying and planing process removes about 1/4" from each side.īefore modern sizing standards, lumber manufacturers just kinda did whatever they wanted to. So the planks are cut to size (you guessed it-2" x 4"), dried (typically baked), and then sent through a planer to ensure the plank is uniform in size and shape. Those planks are still green wood, highly moist, and subject to bending as the wood dries. When a tree is cut down, it's cut very specifically to maximize the number of planks that can be extracted from the obviously round log. However, another thickness that is often seen in deck construction is 2. The most common deck board thickness in North America is 5/4 which, as noted above, is actually 1 thick. Whereas, a 2圆 decking board is rated for both and can also span upwards of 24 OC. I would not have believed the big impact of this tiny cause if my young testers and I had not experienced the difference with the Mattel brick.So this is actually due to sizing standards defining a 2" x 4" as being 1.5" x 3.5", and there's good reason for doing so. A plank that is 5/4圆 is rated for 12 OC and 16 OC. In summary, these 0.2 mm shorter ribs than the Lego bricks’ height act like a funnel and make a crucial difference in assembly, especially with toddlers’ hands that are not yet so skilled. Without the ribs nothing would remain stuck in the L-brick. Threading into an L-brick is therefore much easier than into M-brick. If you press further, the studs will be clamped by the ribs. As a result, the studs of the lower brick “fall” 0.2mm deep without pressure into the opening of the upper brick up to the beginning ribs. It therefore does not reach the inner wall, so that no clamping takes place there. However, the radius of a stud is only 4.8/2= 2.4mm. If you subtract its thickness of 1.2mm, you are left with a distance of 2.7mm from the inner wall. But unlike in your drawing, these do not start at the bottom of the brick, but about 0.2mm above it.Īccording to the drawing, the center of the studs is 3.9mm from the outer wall. Instead of the thicker outer wall, L has 0.3mm thick ribs/nubs that press against the studs. One reason is the thicker outer wall with M (1.5mm) than with L (1.2mm). If I put the M brick from the bottom into the L brick, the clamping force is weaker, as with L. If I put a M brick from the top onto a L brick, the clamping force is strong, as with M. I like this, but it is rather less suitable for toddlers when they want to separate them. Hardwood and Softwood Measurements Different types of wood are sold according to different types of measurements. If a third number is added onto the nominal dimensions, such as 2 x 4 x 96, it indicates the length of the wood. On the other hand, the clamping force of the Mattel (M) bricks to each other is stronger than that of Lego (L). The typical nominal dimensions for wood, such as 2 x 4, refer to the thickness and the width of the wood. If you’re used to Lego, it feels like they resist threading. One disadvantage is that they are more difficult to put together. The deviations and shades of colors as well as unevenness and gaps between the bricks, which all is known from many competing products, are just as absent here as they are with Lego. Accordingly, the bricks are of good quality. The latter comes from Mattel, an American company with decades of injection molding experience. I would never have noticed it if I hadn’t compared a Lego 2×4 brick with a competing product. Hi, there is a small but important and extremely useful deviation of the Lego bricks from your drawing. lego-1×4-technic-brick-dimensions-measurements-3701Īuthor Christoph Bartneck Posted on ApJanuCategories Documentation, LEGO Tags 3D, dimensions, drawing, lego, measurements, model, size, technical The model is available at GrabCAD and the PDF file from here. I had to cut open a brick to get the exact design of the inside tubes right. The technic bricks have a hole in the side for pin connectors or axles to go through. lego-2×4-plate-dimensions-measurements-3020 You can download the model at GrabCAD and the the PDF file from here. This plate is 1/3 of the height of a normal brick. lego-2×4-brick-dimensions-measurements-3001 You can download the model over at GrabCAD and the PDF file from here. I enjoy working in 3D so I used Fusion 360 to create this technical drawing of the LEGO Brick. Of course there are several websites that show you the exact measurements, but some of them were a bit confusing or even broken. The gap between two bricks stacked on top of each depends on how careful to pressed them down. There is a 0.2mm gap between bricks next to each other. The LEGO bricks are precisely designed to fit perfectly together.
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