That would be the U-value or heat transfer coefficient. It is measured in watts per sqft*Kelvin. The easiest way to find this is to look up the R-value or insulation value of a specific material per inch thickness. From there you find the inverse, which is the U-value. You can find R-value lists all over …
Continue reading “What measures how well insulation resists heat loss?”
Principally Douglas Fir (also Larch which is frequently marked as Douglas Fir). Less common, but still used: Hemlock Common Fir Southern Pine Spruce Also, most stair lumber is rated #1 at a minimum.
Both can be good but it will come down to the following: Environmental conditions Specific loading Relief joints – the biggest single issue if all others are equal
The height or type of building isn’t what decides pile foundations, or rather they are secondary reasons (the weight of the building). The quality of the soil on which it is placed is the primary reason. If the weight of the building exceeds the bearing capacity, has a geologic hazard, or provides an unsuitable layer …
Continue reading “Does a lift shear wall of 5 floors require a piled foundation?”
Most of the time it doesn’t matter, but there are three cases I know of that do: Most common is workability. The higher the slump the easier it is to move around once poured. 3″-4″ is usually taken as the baseline. Indication of water content. The water content will determine strength values during cure times. …
Continue reading “How is the slump of concrete selected? Give an example.”
As a few others have mentioned, it has more to do with the way structures are built rather than the material. An earthquake-resistant building constructed of marshmallow can be very successful, but it would barely resemble a building constructed of stone designed to resist earthquakes. Strategies for large flat buildings are also very different from …
Continue reading “Which building material stands up best against large magnitude earthquakes?”
As porosity decreases: Porosity – decreases Density – decreases Apparent density – decreases or can’t be determined Strength – decreases slightly or can’t be determined Water absorption – likely increases or can’t be determined Frost resistance – likely decreases or can’t be determined Thermal conductivity – likely remains unchanged
The deck is the part you walk or drive upon. Suspension refers to a type of bridge construction. The easiest example are bridges with cables. Trusses are structural members similar to beams, but made up of many smaller pieces. Think of freeway sign structures or outdoor concert stage rigging. A viaduct is bridge. Specifically, a …
Typically, your floor slab would be poured on top of your toe slab. Otherwise, you have a problem of the shear at the end of the toe. Unless you really thicken the slab and increase the reinforcement you will get a large crack at the end of the toe. Most designers and engineers avoid this …
The Addams family house, and most other haunted houses for that matter, are variations on the Queen Ann style of architecture. Those variations tend towards Victorian and Edwardian styles with a little Tutor thrown in for the older variants.
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