In the realm of construction, specifically when employing the cast-in-place method for erecting a building, a methodical sequence of events follows the laying of the foundation. The subsequent critical stage involves the formation of the upper-level decks and the pouring of concrete into these forms. A keen understanding of this construction sequence is instrumental in effective schedule planning. The cycle of “form then pour” is repetitive for each floor of the high-rise building until the structure “Tops Out”. The duration of this cycle is contingent upon the size of the deck, potentially spanning five, nine, or even more days.
The day following the concrete placement witnesses a flurry of activity from electricians who are engaged in pre-fabricating inserts for the next deck. Essential materials such as ESL’s, yard el’s, ENT connectors, rigid couplings, supports, plastic or metal sleeves, screws, nails, tie wire, zip ties, and duct tape should ideally be readily available on site in anticipation of this pre-fabrication phase.
The electrician responsible for pre-fabricating the inserts should be furnished with precise quantities to ensure the production of the correct number of inserts.
Leveraging advanced software such as AutoCAD and BIM, an electrician will generate a computer file that is subsequently uploaded into the Trimble Total Station machine. This computer file encompasses a background of the deck and displays the locations of inserts dispersed across the deck. These specific locations are designated as points.
Once the deck is formed and deemed safe for access, the Trimble Total Station is positioned, and the prism operator navigates the deck, pinpointing the locations of the points. Concurrently, another electrician marks these points on the deck with chalk, while a third electrician hammers or screws down the pre-fabricated inserts at these designated points. The process of laying out a deck and installing inserts using a Trimble Total Station necessitates a three-person team. A typical allocation of four minutes per point allows for a reasonable estimation of the total time required for the deck layout.
Upon the completion of insert installation, iron workers proceed to lay down a bottom mat of rebar. Following the installation and profiling of the bottom mat and post-tension cables, the electrician installs raceways like ENT or PVC conduits between the inserts. The final step involves the installation of the top mat and the pouring of the concrete.
Deck work is difficult and can be dangerous. Electrician’s should always exercise caution and observe safety protocols.
Stay safe out there, Buddy