精軋螺紋鋼筋截面面積

基圓面積 base circle area

鋼筋截面不含螺紋的面積。

有效截面系數(shù) coefficient of efficiency section

鋼筋截面基圓面積與含螺紋的面積(即公稱截面面積)的比值

預(yù)應(yīng)力混凝土用螺紋鋼筋以屈服強度劃分級別，其代號為"PSB"加上規(guī)定屈服強度最小值表示。P、S、B分別為Prestressing、Screw、Bars的英文首位字母。例如:PSB830表示屈服強度最小值為830MPa的鋼筋，(通常用PSB830 表示)。

訂貨的合同至少應(yīng)包括下列內(nèi)容:

a)本標(biāo)準(zhǔn)編號;

b) 產(chǎn)品名稱;

c) 產(chǎn)品強度等級代號;

d) 規(guī)格及重量(或數(shù)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.

精軋螺紋鋼筋以屈服強度劃分級別，其代號為"PSB"加上規(guī)定屈服強度最小值表示。

精軋螺紋鋼筋的公稱直徑范圍為18mm~50mm，一般推薦的公稱直徑為25mm、32mm。

其他具體信息請參閱國家標(biāo)準(zhǔn)《GB/T 20065-2006 預(yù)應(yīng)力混凝土用螺紋鋼筋》。