四阿顶 is another way to say 庑殿顶
Which can be seen here:
http://zhidao.baidu.com/question/1306036.html?si=6

In which case:
庑殿屋顶 = Chinese hip(ed) roof / Wudian roof

Examples:
According to the investigation of calamity site and referring to the relevant experimental results from home and abroad,this paper gives following three demonstrations:1. The wind protecting performance of the hipped roof is better than that of the double pitch roof or the gabled and hipped roof. So it is scientific to regard the hipped roof all along as the top grade roof type;2. The roof pitch in history became steeper and steeper. So far from reducing wind protecting performance, it contributes to water proof...
本文研究论证了以下3点:1.庑殿顶作为中国传统建筑最高级的屋顶形式有其科学性;它的防风性能优于双坡顶和歇山顶。2.历史上建筑屋顶由缓变陡并不降低其防风性能,且有利于防水;3.坡屋顶加檐墙的做法有其防风防火的作用,不应一概斥之为制造虚假立面。