# 輕隔間標語2 1/2” 20GA C型立柱@16”為何意?

### 1 個解答

• Chip
Lv 4
1 0 年前
最佳解答

你好!這是指輕隔間牆中C型立柱的規格與間距

分開解釋：

（1）2 1/2"－這裡應該有兩個尺寸分別代表C型立柱斷面的長及寬(你是否漏列一個尺寸？)

2 1/2"=約6.3cm＜──是有一邊尺寸為這種規格的材料

（2）20GA－這是指C型立柱斷面的厚度，GA是Gauge的縮寫（英文解釋為thickness of metal in sheet form）

The sheet metal gauge (sometimes spelled "gage") indicates the standard thickness of sheet metal for a specific material. As the gauge number increases, the material thickness decreases.

Sheet metal thickness gauges for steel are based on a weight of 41.82 pounds per square foot per inch of thickness. This is known as the Manufacturers' Standard Gage for Sheet Steel. For other materials, such as aluminum and brass, the thicknesses will be different. Thus, a 10 gauge steel sheet which has a thickness of 0.1345 inches will weigh 41.82*0.1345 = 5.625 pounds per square foot.

Examples: 16 ga CRS is 2.5 pounds per square foot. For 18 ga CRS the weight is 2.0 pounds per square foot and for 20 ga CRS the weight is 1.5 pounds per square foot.

Standard sheet metal gauges

GaugeSteel

3 0.2391 (6.0731)

4 0.2242 (5.6947)

5 0.2092 (5.3137)

6 0.1943 (4.9352)

7 0.1793 (4.5542)

8 0.1644 (4.1758)

90.1495 (3.7973)

100.1345 (3.4163)

110.1196 (3.0378)

120.1046 (2.6568)

130.0897 (2.2784)

140.0747 (1.8974)

150.0673 (1.7094)

160.0598 (1.5189)

170.0538 (1.3665)

180.0478 (1.2141)

190.0418 (1.0617)

*200.0359 (0.9119)*

210.0329 (0.8357)

220.0299 (0.7595)

230.0269 (0.6833)

240.0239 (0.6071)

250.0209 (0.5309)

260.0179 (0.4547)

270.0164 (0.4166)

280.0149 (0.3785)

290.0135 (0.3429)

300.0120 (0.3048)

310.0105 (0.3200)

320.0097 (0.2464)

330.0090 (0.2286)

340.0082 (0.2083)

350.0075 (0.1905)

360.0067 (0.1702)

370.0064 (0.1626)

380.0060 (0.1524)

簡單來說它是以每英呎平方41.82磅的鋼板厚度正好為1英吋(2.54cm)為基準計算

而20GA是指1英呎平方1.5磅的鋼板厚度，經過表格係數計算為1英吋*0.0359約=0.09119cm

（3）C型立柱@16"是指此C型柱以16"（約為40cm）的間隔設置一支