What's skateboard?

A skateboard is a four wheeled piece of wood used for the activity of skateboarding. The modern skateboard originated in California in the late 1950's. By the mid 1960's they were mass produced and sold throughout the United States.

A skateboard is propelled by pushing with one foot while the other remains on the board, or by pumping in structures such as a pool or halfpipe. A skateboard can also be used by simply standing on the deck while on a downward slope and allowing gravity to propel the board and rider.

There is no governing body which declares any regulations on what constitutes a skateboard or the parts from which it is assembled. Loangboards are a type of skateboard with a longer wheelbase and larger and softer wheels.

Ducks

Most decks are constructed with a seven to nine-ply cross-laminated layup of Canadian maple. Other materials used in deck construction, fiberglass, bamboo, resin, kevlar, carbon fiber, aluminum, and plastic, lighten the board or increase its strength or rigidity. Modern decks vary in size, but most are 7 to 10.5 inches wide. Wider decks can be used for greater stability when transition or ramp skating. Skateboard decks are usually between 28 and 33 inches long. The underside of the deck can be printed with a design by the manufacturer, blank, or decorated by any other means.

The longboard, a common variant of the skateboard, has a longer deck. "Old school" boards (those made in the 1970s-80s or modern boards that mimic their shape) are generally wider and often have only one kicktail. 1970s variants often have little or no concavity, whereas 1980s models have deeper concavities and steeper kicktails.

Grip tapes, when applied to the top surface of a skateboard, gives a skater's feet more grip on the deck. It has an adhesive back and a sandpaper like top.

Trucks

Attached to the deck are two metal (usually aluminium alloy) trucks, which connect to the wheels and deck. The trucks are further composed of two parts. The top part of the truck is screwed to the deck and is called the baseplate, and beneath it is the hanger. The axle runs through the hanger. Between the baseplate and the hanger are bushings, also rubbers or grommets, that provide the cushion mechanism for turning the skateboard. The bushings cushion the truck when it turns. The stiffer the bushings, the more resistant the skateboard is to turning. The softer the bushings, the easier it is to turn. A bolt called a kingpin holds these parts together and fits inside the bushings. Thus by tightening or loosening the kingpin nut, the trucks can be adjusted loosely for better turning and tighter for more control.

Longboard specific trucks are a more recent development. A longboard truck has the king pin laid at a more acute angle (usually between 38 and 42 degrees) to the deck, this gives a lesser degree of turning for the same tilt of the deck. This adds stability and allows riders to go much faster while still maintaining stability and control.

Mounting hardware is a set of eight 10-32 bolts, usually an allen or cross head, and matching self-lock nylock nuts. They are used to attach the trucks to the board. Some have a different colored bolt to show which side is the nose of the skateboard.

What's the relationship skateboard and ict?

The development of skateboard based on the development of ict.. The material used to make the tool need specialist especially from metallurgist.. Support from technology such as computer is the important things to make sure the quality of a material.. So, the development of skateboard generation is nothing without the support from civilian and ict technologist..ict cause people to think something we couldn't do is impossible..ict also cause people to do something beyond their ability..although it has advantage, there also the disadvantage that make people still thinking..