精轧螺纹钢筋

预应力混凝土用螺纹钢筋以屈服强度划分级别，其代号为"PSB"加上规定屈服强度最小值表示。P、S、B分别为Prestressing、Screw、Bars的英文首位字母。例如:PSB830表示屈服强度最小值为830MPa的钢筋，(通常用PSB830 表示)。

订货的合同至少应包括下列内容:

a)本标准编号;

b) 产品名称;

c) 产品强度等级代号;

d) 规格及重量(或数量);

High strength planished concrete renforcing bar is the largediameter,high strength precision straight steel bar with male thread on the whole bar.This bar can be connected with the jointer at any cross section or screwed with the nuts with female screw for fixing.

Planished concrete renforcingbar is widely used for large irrgation works,industrial workshops,large and middle bridges lf road and railway,nuclear stations,anchor blocks and so on.Easy to connect and fixe,high abhesivity,safe and reliable to use,convenience to operate,Using them can reduce steel bars,cross area and weight of the stuctural members.

精轧螺纹钢筋以屈服强度划分级别，其代号为"PSB"加上规定屈服强度最小值表示。

精轧螺纹钢筋的公称直径范围为18mm~50mm，一般推荐的公称直径为25mm、32mm。

其他具体信息请参阅国家标准《GB/T 20065-2006 预应力混凝土用螺纹钢筋》。

基圆面积 base circle area

钢筋截面不含螺纹的面积。

有效截面系数 coefficient of efficiency section

钢筋截面基圆面积与含螺纹的面积(即公称截面面积)的比值