Lets all take a deep breath.. The 747 is not a C5 or a C17… We do not use chains to tie cargo to the floor. We use straps.. And lots of them. Everyone keeps posting pictures of cargo on military planes using chains to secure cargo. We CAN NOT use chains. In 24 years as a 747 loadmaster I have moved all kinds of large cargo. From a 150000 pound generator on two 20 foot pallets. To a 30000 pound role of cable..I always do the same thing. Put locks up FWD and AFT of the pallet and then strap it like we have no locks. The fact of the matter is 1000+ MATV's have moved from CHS to OAI on 747 200. 300 and 400's. With out issue. National did something different that day. Those buckle straps suck.. They Never should have be used on a heavy load..