某高层建筑，抗震设防烈度为6度，钢筋混凝土框架结构抗震等级为三级，按照建筑抗震设计规范的要求，回答下列有关框架梁的设计与施工构造问题：矩形梁的截面尺寸宜满足哪些要求？

翻译：With Average or With Particular Average（WA or WPA）（）

单筋矩形截面梁是指矩形截面梁中只有一根受力钢筋。

与矩形截面梁相比，T形截面梁既节省拉区混凝土，又减轻自重，所以，任何情况都比矩形截面好。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

某钢筋混凝土矩形截面梁的截面尺寸为250mm600mm，梁两侧及梁底用厚20mm石灰砂浆抹灰，则梁两侧抹灰层的重量为________。