Hot answers tagged

16 votes
Accepted

What is the term for diagonal bars which are making rectangular frame more rigid?

Braces. They come in a variety of shapes. K frames, X frames, eccentric frames, etc. . . . .
kamran's user avatar
  • 22.2k
9 votes

Steel vs Bamboo strength types/ weight and in various directions & orientations? Specific, Tensile, Compressive, Shear, Lateral etc?

Stating categorically that bamboo is stronger than steel is a bit like stating that automobiles are faster than planes. On its face, it is a bit shocking, and seems wrong. But a rocket-powered ...
do-the-thing-please's user avatar
6 votes
Accepted

Which drawer design can hold more weight?

Using a tie-and-strut model makes it easier to explain the difference here. A tie-and-strut model is a simplification of the structure which describes where the structure is under tension, and where ...
Wasabi's user avatar
  • 13.1k
4 votes

How to structurally bind bamboo stems for loads?

Bamboo in its natural shape is very prone to splitting. Having any kind of hole will reduce its high bending strength resistance significantly. In addition, bamboo culm does not have a constant ...
Niaz's user avatar
  • 41
4 votes

What is the term for diagonal bars which are making rectangular frame more rigid?

The generic term is Bracing. You will often find it further qualified as Cross Bracing, Diagonal Bracing or Triangular Bracing, depending on the whim of the person doing it.
Neil_UK's user avatar
  • 405
4 votes

Is it practical to build and use a linear or H shift pattern gearbox completely out of wood that will last just as long as metal one?

No You can build a wooden gearbox for novelty use, but meshing and connecting parts is a poor use for wood. Specifically Practical to build: No. As already discussed you would have to make ...
Tiger Guy's user avatar
  • 6,813
3 votes
Accepted

Raised plywood false floor for heavy equipment usages

The use in gyms and dance studios is not a good reference. Those floors are designed for dynamic impact loads from people dropping gym equipment and dancers jumping around. They need to be able to ...
ingenørd's user avatar
  • 1,288
3 votes
Accepted

How well does epoxy bond to PETG / ABS vs Wood?

I have had good luck with plastic specific consumer grade epoxies. Both JB Weld Plastic Bonder and Loctite Plastics have worked well. I have not performed any structural tests with them, but in my ...
ericnutsch's user avatar
  • 8,136
3 votes
Accepted

What is the name of a half wall with posts on top that divides a space into two?

A non jargon terminology (i.e. non scientific architectural) would be permanent room divider or wall divider or plain divider. Probably the proper architectural terminology is mullion is a vertical ...
NMech's user avatar
  • 24.3k
3 votes

Max torque allowed on cypress wooden beam

We really want to avoid putting wood members into torsional stress states. The previous answers are valid and applicable mostly for isotropic materials. Wood is an-isotropic and its material ...
ShadowMan's user avatar
  • 480
3 votes

What's the difference between critical load and yield stress, and failure in general?

Reading the paper, plastic buckling in this context means the collapse of micro-scale cells forming the structure of the wood, causing local buckling of the cell walls. The net effect of this is a ...
do-the-thing-please's user avatar
3 votes

Which frame is optimal for children's bicycle trailers? tubular or rectangular frame and why?

I assume that you are talking about a steel frame with a wooden body mounted on it. In general round tube is more efficient, but if the loading is primarily bending in one direction rectangular ...
Chris Johns's user avatar
  • 15.2k
2 votes
Accepted

For a column, what does "rotation fixed and translation fixed" mean

So there's a permutation of rotation and translation each being either fixed or free for a column. What do each mean? To say that a specific degree of freedom of a support is "fixed" is to say that ...
William S. Godfrey- S.E.'s user avatar
2 votes

Glass/Tile drill bits

A glass or tile drill has a cutting edge designed for that hard material which comes off as a dust. A wood bit cuts more material faster so it has a fluting designed to remove that material. Purchase ...
Solar Mike's user avatar
  • 15.6k
2 votes

How do I know how solid material has to be?

A known system of classification of wood is: Hardwoods, which are flowering trees like, oak, maple, cherry. Softwoods, which are conifers. Like pine, Douglas fir, redwood. Generally, hardwoods are ...
kamran's user avatar
  • 22.2k
2 votes
Accepted

What's the minimum number of required wooden pieces to make this door structually solid?

One A gate like that will have a single diagonal from upper right to lower left. All you really need to do is turn the rectangle into triangles.
Tiger Guy's user avatar
  • 6,813
2 votes

What's the minimum number of required wooden pieces to make this door structually solid?

Doors are built as strong as needed. Depending on their utility. For example for a residential exterior door they use solid core oak or similar wood. For interior they use hollow core with a frame ...
kamran's user avatar
  • 22.2k
2 votes

What is the term for diagonal bars which are making rectangular frame more rigid?

Another common term, used in many trades, is bracing, such as diagonal bracing.
Solar Mike's user avatar
  • 15.6k
2 votes

What is the term for diagonal bars which are making rectangular frame more rigid?

One common name is shear ties.
NMech's user avatar
  • 24.3k
2 votes

How is fire risk reduced in dense contemporary timber neighbourhoods?

They protect the combustible framing by cladding it in fire-resistant materials like gypsum boards. Fire code is an integrated and elaborate part of the building code. It assigns fire protection ...
kamran's user avatar
  • 22.2k
2 votes
Accepted

Is it feasible to mount a 40kg shelf on a rotating and sliding pole?

Based on your nicely constructed model, it appears that two axes of movement will be required. The vertical axis can be addressed by a pair of bearing assemblies securely mounted to the top and bottom ...
fred_dot_u's user avatar
  • 7,055
2 votes

What type of drill bits are these?

They look like standard twist bits in relatively good shape (good cutting ends). Very likely High Speed Steel ("HSS"), doesn't make a difference which HSS for a homeowner. Presume they were ...
blacksmith37's user avatar
  • 6,134
2 votes

Solutions for a slanted roof

Many fastener companies have a fastener made for this specific application. They test these fasteners under all kinds of situations, winds, earthquakes, extra loads. Here is one made by Simpson ...
kamran's user avatar
  • 22.2k
2 votes
Accepted

Resources for engineering with wood

The 2018 National Design Specification (NDS) for Wood Construction is a comprehensive guide with worked-out examples. This is the 2018 version. if you google NDS or AWC there are many free educational ...
kamran's user avatar
  • 22.2k
2 votes

Making shipping containers with wood instead of steel, is my calculation sound and valid?

Thing is shipping containers are, generally cheap due to multiple reuse. Used ones are frequently sold at prices that don't even cover the material cost if I were to build my own. Metal is easy to ...
joojaa's user avatar
  • 3,597
1 vote

doubling the existent two brackets - will it help with my grape press?

I would put plates at the corners, bolted where I've indicated (or choose your own spots -- just make it adequate, and think about how the wood is going to "want" to split when pressure is applied). ...
TimWescott's user avatar
  • 2,522
1 vote

Wood support calculation

I wouldn't be that much worried about the support bracket. There are standard brackets that would more or less be able to handle the load. What i'd be more worried is that on the strong axis of beam ...
NMech's user avatar
  • 24.3k
1 vote

Wood beam connection

From what I see in the picture I am getting the impression, that these two are for completely different uses. The one above seems to refer to connection of two wooden beams on top of a column, such as ...
NMech's user avatar
  • 24.3k
1 vote

Do the floorboards in timber beam floors have a structural function?

The floorboards functions are supporting and distributing loads on beams. Another function is to brace the beams. In the design of the beams we only consider the rectangle section beam, not I section. ...
Ben2014's user avatar
  • 21
1 vote

Do the floorboards in timber beam floors have a structural function?

Most of the wood floors of that type tend to be tongue and groove so they do "interlock" with each other as it helps to prevent squeaking. They are structural as they need to spread the load and be ...
Solar Mike's user avatar
  • 15.6k

Only top scored, non community-wiki answers of a minimum length are eligible