Luffing jib cranes are a type of tower crane commonly used in construction and heavy lifting. They feature a horizontal arm, or jib, that can be raised and lowered, allowing for greater flexibility in lifting materials. This design is particularly useful in tight spaces, as it can operate without needing to swing the entire crane. These cranes are equipped with a mechanism that allows the jib to luff, or tilt, which helps in positioning loads more accurately. Luffing jib cranes are often used in urban construction projects where height restrictions and limited space are significant considerations.