Symmetrical Curved Beams

Does anyone know how I can create beams like the ones going off the roof in this image to a lantern on blender (symmetrically)?: http://previews.123rf.com/images/thorsten/thorsten0709/thorsten070900659/1777731-Asian-Style-Roof-Building-In-The-Chinese-Garden-Darling-Harbour-Sydney-Australia-Stock-Photo.jpg

Here is the lantern: file:///C:/Users/Public/Pictures/Sample%20Pictures/l.jpg

Thanks!

Sorry, that lantern link doesn’t work! Here’s one that does: http://postimg.org/image/mvb6xjwwz/