Blaze Through the NFPA 1006 OFM Test 2026 – Ignite Your Firefighting Future!

When two hauling TMAs are connected in series, their mechanical advantages multiply. The first TMA provides 3:1, so for every unit of input force you get three units of output. That output then becomes the input to the second TMA, which multiplies by 2: for each unit fed into it, you get two units out. Combined, 3 × 2 gives a final advantage of 6:1. So the overall system can move six times the input force (ignoring friction and rope weight). If they were arranged to share the load in parallel, you’d add the advantages instead, giving 5:1, but the given setup implies a series connection, hence 6:1.