Miscellaneous engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more

ANSI Abbreviations for Scientific and Engineering Terms

ANSI Y1.1-1972

Abbreviations according International Electrotechnical Commission

Conforming abbreviations according IEC

Air Temperature and Altitude

Altitude - air temperature and air density

Altitude above Sea Level and Air Pressure

Elevation above sea level - in feet and meter - with barometric and atmospheric pressure - inches mercury, psia, kg/cm2 and kPa


Cooling systems capacities and antifreeze required

Apothecaries' Fluid and Weight Measure

Fluid and weight - ounce, drachms, grains, scruples ..

Area Survey App

Online calculator app to make an exact plot of a surveyed area - like a room, a property or any 2D shape

Assembly of Shrink-Fits

Heating temperatures of shrink-fits

Barometers and Elevation Compensation

Compensating barometers for elevation

Barometric Pressure - Pressure in Pounds per Square Inch and Square Foot

Relation between barometric pressure (inches Hg) and pressure in psi and psf

Beaufort Wind Scale

The Beaufort description and observation of wind and wind velocity

Blueprint Letters

Common letters used in blueprint drawings

Board Feet Chart

Board Foot - the volume measurement of lumber

Builder's and Surveyor's Measurements

Convert builder's measurements to surveyor's measurements

Building Tolerances

Typical building tolerances

CE Marking

The European Machine Directive

CSI MasterFormat Specifications

Construction Specifications Institute's 2004 Master-Format Edition

Chemicals and Chemical Formulas

Chemicals and trade names

Clothes - Comparing US, UK and European Sizing

Comparing European, UK, US sizing in clothing, shoes, shirts and sweaters

Concrete - Calculating Cubic Volumes

Calculate concrete volume

Concrete Columns

Estimating concrete required to concrete columns

Concrete Footing

Estimate amount of concrete for footing

Concrete Walls

Estimating concrete walls

Constants of e

e constants

Constants of π (pi)

π constants

Converting Minutes to Decimal Hours

Minutes to descimal hours

Conveying Capacity

Determining conveyor capacities

Conveyor - Load & Power

Load and required power

Conveyor Slopes

Maximum conveyor slopes for various materials

Cooking Volume Converter

Convert between liquid volumes used for cooking

Cooking Volume Converter - US and Metric Units

Convert common cooking liquid and dry measuring volumes between US and metric units


Decibel is a logarithmic unit used to describe the ratio of a signal level - like power, sound pressure, voltage, intensity etc.

Design for Assembly - DFA - index

Design for Assembly Index

Drawings - Sheet Layouts

Standard layouts of drawing sheets

Drawings - Standard Metric Sizes

Standard metric sizes of drawing sheets

Drill Bit Speed - Hardwood and Softwood

Hardwood and softwood drill speed chart

Driving Distances between European Cities

Driving distances between some major European cities

Dumping Angles

Tipping angles - common materials as ashes, sand, earth, shingles ...

Dust Explosions - Critical Temperatures and Concentrations

Critical temperatures and concentration parameters for substances like coal, zinc, uranium and more

Effects of Low-Frequency Vibrations on Buildings

Effects of low-frequency vibrations on building constructions

Electrical Equipment and Power Consumption

Typical power consumption and running time for some common electrical equipment

Electrode Potential and Galvanic Corrosion

Introduction to electro chemical series and corrosion of metals

Elevation - Speed of Sound

Speed of sound, temperature and pressure at various elevations

Engine & Gear Oil - Temperature and Viscosity Limits

Oil viscosity vs. temperature

Estimating Brick - Quantity and Mortar Consumption

Bricks - quantity and mortar required

Estimating Concrete

Concrete volume per sq. ft. of slab

Excavation Slope

Calculating excavation slope

Factors of Safety

Factors of Safety - FOS - are important in engineering design

Fasteners - Types Chart

Wood Screws, Machine Screws, Sheet Metal Screws, Self Drilling SMS and more

Feet and Inches to Inches

From feet and inches to inches conversion

Firestop Ratings

F-rating, T-rating and L-rating of firestopping systems

Friction and Coefficients of Friction

Friction theory and coefficients of friction for common materials and materials combinations

Frozen Foods and Storage Life

Practical storage life of common frozen foods

Fruits and Vegetables - Optimal Storage Conditions

Optimal temperature and humidity conditions for some common fruits and vegetables

Fuel Consumption Converter

Convert between common fuel consumption units - US MPG, Imperial MPG, l/nm, l/100 km and km/litre

Gauge and Weight Chart

Gauge and weight chart for sheet steel, galvanized steel, stainless steel, aluminum and strip & tubing

Glue-laminated Timber Sizing

Glue-laminated timber dimensions

Golden Section

or Golden Mean

Gravel - Cover Area

Aggregate cover area

Greases - Temperature Limits

Grease is a combination of oil and thickener

Hardwood Lumber Dimensions

Hardwood dimensional lumber sizes

Hazardous Areas Classification - European Standard

European hazardous area classification in zones, protection types, temperature codes and codes

Hazardous Areas Classification - North America

North American hazardous locations classification in classes, divisions and groups

Imperial Paper Sizes

Used for printing and drawing papers

Inches and Decimal Equivalents

Decimal equivalents of eights, sixteenths, thirty-seconds and sixty-fourths of an inch

International Standard Atmosphere

International standard atmosphere in elevation -2000 to 30000 meters - pressure, temperature, density, viscosity, thermal conductivity and velocity of sound

Latitude and Acceleration of Gravity

Acceleration of gravity and degrees latitude

Latitude and Longitude Converter

Convert between Degrees, Minutes and Seconds and Decimal Units (or vice versa)

Lead Acid Batteries

Specific gravity and charge - temperature and efficiency

Length Units Converter

Convert between units like meters, feet, inches, yards, kilometers and miles

Liter per km

Distance traveled and fuel consumption - liter per km

Loads on Building Foundations

Building loads on foundations

Machine Processing and Tolerance Grades

Relation of machine processes to tolerance grades

Manila Rope - Strength

Manila rope 3-strand. minimum breaking strength and safe load

Mapping Scales - Lengths and Areas

Convert from mapping scales to length and areas

Masonry Blocks

Concrete Masonry Unit Blocks - CMU - dimensions

Materials - Light and Reflecting Factor

Reflecting factor of materials

Metric Bolts - Head and Wrench Sizes


Metric Reinforcing Bar (re-bar)

Reinforcing bar - European metric dimensions

Mild Steel Rounds

Typically available mild steel rounds

Miles Traveled per Gallon

Miles per gallon fuel chart

Mortar Types

ASTM Mortar Types

Nails and Spikes

Allowable withdrawal load

Numerical Constants

Some numerical constants

Nylon Rope - Strength

Nylon rope 3-strand and 8-strand. minimum breaking strength and safe load

Oils - Lubrication and Temperature Limits

Temperature limits lubricating oils

Online Mortgage Payment Calculator

Calculate mortgage payment with Annual Interest Rate, Number of Years and Amount Borrowed

Osmotic Pressure of Foods

Osmotic pressure of some food materials

Paper Drafting Sizes - Comparing ISO Drawing Sheets with U.S. Drawing Sheets

ISO drawing sheets compared with U.S. and Canadian drawing sheets

Paper Drafting Sizes - ISO 216 series A, B and C

The ISO 216 A, B and C drawing series - dimensions of regular, oversized and envelope sheets

Paper Sizes - commonly used in U.S. Offices

Office paper sizes as Letter, Legal, Tabloid and more

Pasteurization Temperatures

Pasteurization methods and temperatures

Poisson's ratio

When a material is stretched in one direction it tends to get thinner in the other two directions

Polyester Polyolefin Rope - Strength

Polyester Polyolefin dual fiber rope 3-strand - minimum breaking strength and safe load

Polyester Rope - Strength

Polyester rope 3-strand and 8-strand. minimum breaking strength and safe load

Polypropylene Fiber Rope - Strength

Polypropylene fiber rope 3-strand and 8 strand - minimum breaking strength and safe load

Quantity of Studs

Calculate number of studs

Rebar Weight

Weight of rebar rods - size ranging 1/4

Roman Numerals

Roman numerals are a combinations of seven letters

Roof Framing

Run, Roof Slope, Gable Height and Gable Area

Roofing Materials - Weight

Weight calculator - roofing materials

Safe Load Shackles

Safe load for shackles

Safety Signals - recommended Colors

American National Standards Institutes schedule for safety colors marking physical hazards


Sandpaper - grit sizes

Scale of Objects

The relative scale of objects

Shipping Measure

Vessel and cargo capacity

Sieve Sizes and Mesh Designations

Commonly used US commercial sieve sizes and mesh designations

Simply supported Concrete Slabs Load Capacity

Load capacity of simply supported concrete slabs

Sisal Rope - Strength

Sisal rope 3-strand, minimum breaking strength and safe load

Slope - Degree, Gradient and Grade Converter

Converting slopes between degrees, gradients and grades

Softwood Lumber Grading

Rough Lumber, Surfaced Lumber (dressed), Worked Lumber, Shop and Factory Lumber and Yard Lumber

Softwood Lumber Sizes

Commercial softwood lumber dimension chart - nominal and actual sizes

Soil and Rock Bulking Factors

Soil or rock expansion - swell - after mining

Speed and Velocity Converter

Convert speed and velocity units - m/s, km/h, knots, mph and ft/s

Speed/Time Graph

Speed plotted against time

Sprinkler Protection Area

Maximum fire sprinkler protection area

Square Mild Steel Bars

Typical weight of mild steel square bars

Stairs Calculator

Calculate unit rise and run

Standard Gauges

Standard gauges for wire and sheet - American, Birmingham, Washburn, Music, Stubs ..

Standard US Architectural Drawing Sizes

Commonly used US architectural drawing sizes and formats

Standard US Engineering Drawing Sizes

US engineering drawing sizes based on ANSI/ASME Y14.1

Steel Flats Weights

Typically weight of mild steel flats

Steel Plates - Size & Weight

Steel plates size & weight - thickness range 3/16 - 10 inches - and metric units

Steel Wool Grades

Steel wool grade and fiber thickness

Stockpile Volume

Volume in natural piles - cubic feet, yard, meter and decimeter

Stress in Bolts

Calculating stressed area in UN and UNR bolts

Surface Finishing

Lumber and surface finish abbreviations

Surface Roughness and Abrasive Grain Size

U.S. mesh size and surface roughness

Surface Roughness and Mechanical Processes

Different mechanical production methods and surface roughness

Tank Volume

Volume of cylindrical (round) tanks - US. gallons per foot of dept or length

Tempering Colors Steel

Tempering process of hardening steel

The Greek Alphabet

The Greek alphabet is essential when expressing formulas and technical language

Thickness of Concrete Slabs

Recommended thickness of concrete slabs

Threads - Metric ISO 724

M Thread (metric ISO 724 thread) European Standard

Torque Lubrication Effects

Lubrication effects on torque

Trees and relative Water Demand

High, moderate and low water demand

Trench Excavation

Calculate trench excavation

Troy Weight

Weighing gold and silver

Types of Contracts

Commonly used engineering and construction contracts

U.S. Imperial Reinforcing Bar (re-bar)

Rebar, U.S. imperial dimensions

US Bolts - Head and Wrench Sizes

Hex Bolt, Lag Bolt, Square Bolt and Heavy Hex Bolt

US Machine Screws

Machine Screw Diameters

US and Metric Fasteners - Thread Sizes

Printable fastener tools series

UTM to Latitude and Longitude Converter

Online UTM to Latitude Longitude converter


The ASTM E1557 UNIFORMAT II Standard

Unit of Fineness for Precious Metals


Urban Trees

Height of trees commonly used in towns

Value Engineering

Enhancing function - improving value

Vehicle Flow and Density

Highway design

Vehicle Miles Traveled

Speed (miles per hour), time (hours) and distance traveled (miles)

Vehicle km Traveled

Speed (km per hour), time (hours) and distance traveled (km)

Volume of Rectangular Tanks

Tank volume per foot of depth

Water to Cement Ratio

Water to cement ratio in concrete

Weight and Strength of Stone

Sandstone, Granite, Limestone, Marble and Slate

Wire Rope - Strength

Wire rope 6-strand x 19 wire (6 x 19) - weight - minimum breaking strength and safe load

Wood Moisture and Compressive Strength

Red Spruce, Longleaf Pine and Douglas Fir - moisture content and compressive strength

Wood Screws

Allowable withdrawal load

Wood Screws

Shank diameters - pilot holes

Wood Screws - Holes

Pilot holes, shank clearance holes and countersink diameter - hard wood and soft wood

Wrench Conversion Chart

Comparison of US and metric wrenches

pH Definition

Introduction to pH

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