The portico at the front of the temple was twenty cubits long across the width of the building and twenty cubits high.

殿前的廊子长二十肘，与殿的宽窄一样，高一百二十肘。

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If the request gate leg width is big, the working speed is high, or lifts heavy, the long big-ticket item frequently, then chooses the double Liang portal type hoist crane suitably.

如果要求门腿宽度大，工作速度较高，或经常吊运重件、长大件，则宜选双梁门式起重机。

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