A cable block engageable with a support cable and configurable between an open configuration and a closed configuration, the cable block comprising: a frame having an upper section and a lower section hingedly connected to one another at a pivot point and together defining an inner opening having a lower portion and being shaped and sized to receive the support cable, the upper section of the frame comprising: a hinge connecting end hingedly connected to the lower section of the frame at the pivot point; a latch end having a locking cavity and a locking protrusion extending inside the locking cavity; and a lever defined at the hinge connecting end and extending on an opposite side of the pivot point than the remaining of the upper section of the frame, the lever being configured to extend into the inner opening and be engageable with the support cable, when the cable block is configured in the open configuration, and to drive the upper section of the frame in rotation upon a force being exerted on the lever by the support cable, to move the cable block from the open configuration to the closed configuration; a latch pivotally mounted to the lower section of the frame to pivot about a latch pivot point between a locking position and a release position, the latch having a latching hook at a first end and a latch engagement member at a second opposed end, the latching hook being engageable with the locking protrusion of the upper section of the frame to lock the cable block in the closed configuration upon transition of the cable block from the open configuration to the closed configuration, the latching hook also having a rounded top configured to cause the latching hook to pivot momentarily from the locking position to the release position when engaged by the locking protrusion, during the closure of the upper section of the frame, with the latching hook being further configured to subsequently move back to the locking position to lock onto the locking protrusion; and a main sheave rotatably mounted to the frame in the lower section thereof and having a section defining the lower portion of the inner opening. a frame having an upper section and a lower section hingedly connected to one another at a pivot point and together defining an inner opening having a lower portion and being shaped and sized to receive the support cable, the upper section of the frame comprising: a hinge connecting end hingedly connected to the lower section of the frame at the pivot point; a latch end having a locking cavity and a locking protrusion extending inside the locking cavity; and a lever defined at the hinge connecting end and extending on an opposite side of the pivot point than the remaining of the upper section of the frame, the lever being configured to extend into the inner opening and be engageable with the support cable, when the cable block is configured in the open configuration, and to drive the upper section of the frame in rotation upon a force being exerted on the lever by the support cable, to move the cable block from the open configuration to the closed configuration; a hinge connecting end hingedly connected to the lower section of the frame at the pivot point; a latch end having a locking cavity and a locking protrusion extending inside the locking cavity; and a lever defined at the hinge connecting end and extending on an opposite side of the pivot point than the remaining of the upper section of the frame, the lever being configured to extend into the inner opening and be engageable with the support cable, when the cable block is configured in the open configuration, and to drive the upper section of the frame in rotation upon a force being exerted on the lever by the support cable, to move the cable block from the open configuration to the closed configuration; a latch pivotally mounted to the lower section of the frame to pivot about a latch pivot point between a locking position and a release position, the latch having a latching hook at a first end and a latch engagement member at a second opposed end, the latching hook being engageable with the locking protrusion of the upper section of the frame to lock the cable block in the closed configuration upon transition of the cable block from the open configuration to the closed configuration, the latching hook also having a rounded top configured to cause the latching hook to pivot momentarily from the locking position to the release position when engaged by the locking protrusion, during the closure of the upper section of the frame, with the latching hook being further configured to subsequently move back to the locking position to lock onto the locking protrusion; and a main sheave rotatably mounted to the frame in the lower section thereof and having a section defining the lower portion of the inner opening.