Studs have a U-shaped cross section and are called U-Channel in English.
The dimensions and size of UNP (studs) depend on their type. These dimensions are:
| Wing height | Is denoted by the letter h |
| Thickness | Is denoted by the letter ts |
| Wing width | Is denoted by the letter b |
| Wing thickness | Is denoted by the letter tg |
| Cross section | Is denoted by the letter A |
| Weight per meter | Is denoted by the letter G |
| Gravity axis distance | Is denoted by the letter ez |
| Cutting center distance | Is denoted by the letter YM |
Marine studs
Grade A marine studs, A36 and Gl-A studs are produced with U-shaped cross section and high quality level.
Marine studs are generally manufactured and supplied by foreign companies.
Marine studs, like the corner of the sea described in a separate section, reach the minimum percentage of destructive elements in steel (sulfur and phosphorus less than 0.035) after a few melting steps. This gutter has a high resistance to salt and open water salts and is naturally used in marine, shipbuilding and wharf industries.
For example, the dimensions of UNP 40 are equal to:
h = 40mm / ts = 5mm / b = 35mm / tg = 7mm / A = 6.21cm2 / G = 4.87 kg / m
/ ez = 1.33 cm / YM = 2.32