Kwikstage Ladder Access Transom is used where a ladder access or trapdoor is required inside a bay. The Ladder Access Transom is located between the two ledgers, this is placed approx 64" from the previous transom. To be used with a Safety Trap-Door, a single section verticle ladder is held in place with 4 nos Metal Ladder Clamp. We recommend that you used 2 nos 64" steel planks, the remaining space is filled with 3 nos steel planks.