# Tag Info

## Hot answers tagged standards

9

I 'll start with the one that you should DEFINITELY NOT use: $mm^3$ or $mm3$. Probably the most widely used is the 1st. It's compact and economical and these are two of the most deciding factors in Engineering thought and practice. To take the point one step further, if it's in an engineering drawing you don't even need to put units in. Unless, its ...

6

In the United States at least, the design of mass-produced furniture if covered under ANSI/BIFMA (Business and Institutional Furniture Manufacturer's Association) X5.5. I don't have a copy of the standard to give you specific values, but in broad strokes the requirements for consumer goods like this (where the consequences of failure are much less than in an ...

6

In an earlier comment, I suggested that an answer to "what is the correct way..." (as opposed to "What is the generally accepted way...") might be found in the ISO 80000-3 standard. I had a look, and there's nothing relevant in ISO 80000-3. Nor can I find any other ISO standard that explicitly states a correct way of doing this. ...

5

I've seen numerous formats in my experience. Per some of the comments, sometimes you'll see a fraction represented with dashes, underscores, or as a decimal. I find that most often, decimals are used. 1/2 = 1_2 ,1-2, 500 5/16 = 5_16 , 5-16, 3125 When you have 1 1/2" then I see 1_500 where the underscore would represent the decimal point. I don't think ...

4

The diagram most closely related to the original question seems to be a kinematic diagram. Kinematic diagrams are standardized in ISO 3952, although it seems that most often people are just copying what they have seen without reading the standard (which is quite old, but then this is common anyway). The standard is in 4 parts and covers symbols, and ...

4

In the Southern African context this would be defined as a "cold formed lipped channel" section. I am not sure if it the same across the world though. Here is one supplier's link

4

For the Maths of calculating uncertainty the standard document is the GUM. Which describes all the maths but can be somewhat unclear if you don't already have some idea how it is supposed to work. Depending on your current level of expertise there are several good introductions to uncertainty calculations. I would recommend A Beginner's Guide to Uncertainty ...

4

I saw some material for tension rods that match the material properties that you gave, but these places do not list the steel used. It might be proprietary: Ronstan DaverSteels A third manufacturer Macalloy, has a similar component that also doesn't list a material specification, but it does have an independent certification of its material properties. ...

4

If you are likely to share your files with other organizations that use different operating systems, you need to research what works best on all the main options - i.e. Windows, MacOS, and the various flavors of Unix. The "If it works on Windows 10, that's OK because it's the only system we use" is probably digging a hole to fall into in future! Spaces in ...

4

This answer comes from my experience in mechanical engineering, a structural engineer might have a different perspective. It is difficult to come up with a standard set of terms for planes or axes in mechanical and structural engineering since each there are so many different types of work within each discipline. There are probably some specialist-specific ...

3

As @Wasabi and @AndyT mentioned in the comments, this means the maximum value $k$ can have is $2$, so if $d<200$ then $k=2$. This can be confirmed in the section on shear design for slabs from the document 'How to Design Concrete Structures to Eurocode 2'. Table 7 from this document shows: which has $V_{Rd,c}$ unchanged for effective depths $d<200$ ...

3

Cengel's Book: Yunus A. Cengel;John M. Cimbala;Robert H. Turner, Fundamentals of Thermal-Fluid Sciences. 4th. McGraw-Hill, 2012 Here is an extract of the property tables: http://www.kostic.niu.edu/350/_350-posted/350Chengel7th/Appendix1Udated.pdf (for air, see A-2, A-16 and A-17) There is also: Yunus Cengel and Afshin Ghajar, Heat and Mass Transfer, ...

3

Internationally, the General Conference on Weights and Measures (French: Conférence générale des poids et mesures - CGPM) is the senior of the three Inter-governmental organizations established in 1875 to define standards for weights and measures. The other two organizations are: the International Committee for Weights and Measures (French: Comité ...

3

In the US the National Institute of Standards and Technology (NIST) was established in 1901 by U.S. Code, Title 15, Ch. 7, sec. 272. Section (b) of that code states that, among other things, the functions of the Secretary and Institute is (2) to develop, maintain, and retain custody of the national standards of measurement, and provide the means and ...

3

ASTM A615 appears to standardize rebar using that grading designation: i.e. Grade 520 [MPa] (or Grade 75 [ksi]), but only provides testing to ensure that a particular material is at least some strength. The test does not specify composition, only that the material is plain carbon-steel. BSEN10149 is a British standard grading for steel alloys evidently, and ...

3

The normative reference for the design of wall boxes for electrical work in the US is NEMA OS-1 for metal boxes and NEMA OS-2 for nonmetallic boxes. This, in turn limits the size that components to go into these boxes (including outlets) may be. If you don't want to buy the standard, you can find a good bit of information from it posted from various ...

3

I think it means the relevant section of EN 1993 for the specific use (application) of the plated structure. A partial table of contents of EN 1993 includes Part 2: Steel Bridges Part 3-1: Towers, masts and chimneys Part 3-2: Towers, masts and chimneys - Chimneys Part 4-1: Silos Part 4-2: Tanks Part 4-3: Pipelines Part 5: Piling Part 6: Crane supporting ...

2

That would be Process Industry Practices, Practice Ref. PIC001. Issued 7/15/1998. Appendix A1 contains exactly what you listed. Edit: I just came across this online: PIC001 Sample, Not for Commercial Use

2

There is an ISO standard for this. The latest version is (probably) "ISO 3098-1:2015 Technical product documentation -- Lettering -- Part 1: General requirements". http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=65679 There are some equivalent local standards, for example DIN 6776, and I believe there is an ANSI standard that ...

2

I don't know if there is a formal "standard" for lettering on hand drawings. The best I could tell you to do is consult an older drafting text or the book "Architectural Graphic Standards": http://www.amazon.com/Architectural-Standards-American-Institute-Architects/dp/0471700916 Many draftsmen had their own personal styles for lettering, and as long as it ...

2

For aviation, aerospace, and naval (and to a lesser degree automotive) engineering, the three axes are pitch, yaw and roll axes - with the names pitch, yaw and roll corresponding to rotational motion around these, and sway, heave and surge for translational motion along them. Velocities in these are groundspeed/speed over ground(SOG) (measured along travel ...

2

In engineering there are four views, or axes that I can think of: longitudinal - which is parallel to the longest vertical side of an object, cross-sectional - which is parallel to the shortest vertical side of an object & is at right angles to the longitudinal view/axis. plan - which is usually the horizontal view or axis, as viewed from above the ...

2

Here is a link to a screw thread chart. http://www.engineersedge.com/screw_threads_chart.htm Note there are different tolerance classes, and also note the max is never over the nominal size. For the example 1/4-20 class 2: 0.2408 < d < 0.2489 class 3: 0.2419 < d < 0.25

2

We use the left bracket. It looks the best in our opinion: 1/16" = 1[16 in. 3/8" = 3[8 in.

2

In this situation, you might do just as well to use a U-tube manometer. Is some respects, this is a sort of dead-weight tester where the fluid itself is the dead weight. In this device pressure is determined from the difference in height between two connected volumes of fluid. Usually this is just a transparent tube bent into a 'U' shape, placed upright in ...

2

A few points; Actually covering the subject requires a book. For steels , the differences in properties vary with thickness because of : 1- inclusions, 2- grain size, 3- hardenability, 4- composition, 5- Actual product thickness, 6- steel making practice, 7- casting technique, And several things I forgot. Inclusions are generally concentrated near the center,...

2

Go directly to the ASTM site. I put "nylon rope" in search and it said there were 154 possibilities.

2

1x2x3 mm is usual. You might specify individual units if they used different multiples. For example, if you had a large sheet of thin material you could describe it as 1 m x 2 m x 3 mm. However in metric engineering drawings it is common to keep everything in mm and describe this as 1000 x 2000 x 3 (with a note in the corner of the drawing stating all ...

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