Structural steel beam with a letter I shaped cross-section. I-beams are used for support with long spans such as basement beams or over wide openings. I-beams should always be slightly larger than the calculated size, ensuring enough strength for the weight it will support.
Build up of ice which occurs when snow piles up on the roof of a house, melts and runs down the roof, freezing just about the time it reaches the eaves. Gradually the ice forms a dam which blocks the water behind it so that it can't run off and eventually seeps under the shingles and building paper, soaking through the wood and runs down into the house, causing water damage.
1. Inadequate cash to meet obligations. Real estate is an illiquid asset because of the time and effort required to convert it to cash.
2. A characteristic of an investment indicating an inability to sell or convert to cash in a short period.
Total opposition to the current flow in an AC electrical circuit, which is equal to the square root of the sum of the squares of resistance and reaction in the circuit. The circuit voltage divided by the circuit impedance and the flow of current in an AC circuit are equal.
Used most often when pressure is needed in a system or fluid must be moved upward, it consists of a rotating wheel with vanes, inside a casing, for example a centrifugal pump. The fluid that goes into the center of the spinning impeller is flung to the outer edges by use of centrifugal force, which gives velocity to the fluid due to the rotational speed of the impeller. The flow of the fluid is directed through the pump casing discharge outlet by the casing around the impeller. An impeller can be used with a number of fluids.
Land that has been developed for use and has had installation of such utilities as water, sewer, roads and building structures. These improvements make the raw land increase its usability, thereby increasing the market value.