Study each topic below — these are the core knowledge areas tested in Year 1. Build a solid foundation here before advancing to Year 2 material.
📖Mast Climbing & Jumping
- Climbing frame (cage): surrounds mast; hydraulic cylinder pushes crane up one section at a time
- Climbing sequence: add section below slewing unit; lock pins; climb; repeat
- Climbing requires: no load, low wind, qualified crew, engineer oversight
- Tie-in anchors: bolted to building structure at intervals to limit mast free-standing height
📖Load Moment Indicator (LMI)
- LMI monitors: load weight, trolley radius, and calculated moment in real-time
- Overload: LMI cuts hoist-up, trolley-out, and slew away when approaching 100% rated moment
- Warning alarm activates at 90% rated moment — operator must respond before cut-out
- LMI calibration must be verified whenever crane is climbed or ballast is changed
📖Ballast & Counterweight
- Counterjib ballast: concrete or steel blocks; quantity and placement specified by manufacturer
- Incorrect ballast: alters crane balance — never reduce or relocate without engineer approval
- Maximum ballast defined per jib configuration; adding extra increases foundation loads
- Ballast must be secured and inspected; cracks or spalling must be reported
📋CSA Z248 — Tower Crane Standard
- CSA Z248: Canadian standard governing tower crane design, erection, use, and inspection
- Annual inspection required by qualified inspector; documentation retained by owner
- Erection/dismantling plan: required for every project; must be site-specific
- Operator qualifications: minimum hours + written/practical exam per provincial requirements
📖Anti-Collision Systems
- Required when two or more cranes have overlapping working zones
- System uses slewing angle and trolley radius data to predict collision zones
- Collision zone: crane automatically slows and stops before entering zone of other crane
- Override: only permitted with coordinator present and both operators in radio contact
📖Erection & Dismantling
- Erection crew: licensed tower crane mechanic required in most provinces
- Foundation: designed by engineer; anchor bolts cast into concrete pad or frame
- Sequence: base → mast → climbing frame → slewing ring → counterjib → jib → ballast
- Dismantling: reverse erection sequence; must be done in correct order to maintain balance