Build – General Contractor Work
Congratulations! You have designed your elevator. Now you have to make sure it is installed properly. Below is an outline of the General Contractor’s scope of work.
Step 1: Order the Elevator
Lead time is 8 weeks for a hydraulic modular elevator, 12-16 weeks for a traction or MRL, or if there are custom components with longer lead times. Once you issue us a PO, we’ll produce submittal drawings for your review. When you approve those, we’ll put your elevator into production. Meanwhile you can do the site work needed to prepare for the elevator.Detailed Timeline
Step 2: Site Prep - Pour the Pit
Dig and pour a concrete pit for the hoistway, with cast-in-place anchor bolts in the corners. You need to engineer the pit foundation and reinforcement based on the elevator’s pit reactions that our engineer supplies to you, the jobsite’s soil conditions, and your local code requirements.
Typical pits have 8” walls and 12” floors. See pit layout drawings for precise measurements for your job.
If you have a sump hole, cover it with a non-combustible material, typically a sheet of metal.
Pour a concrete slab for the modular machine room, if ordered. Purchase epoxy anchors to bolt it to the foundation after it is set.
If the machine room is not adjacent to the hoistway, piping and electrical must be run underground or overhead. Coordinate with PME and the installer to determine any building preparations needed to accommodate this.Pour the Pit
Step 3: Make Door Penetrations
Make proper rough openings at each landing. Refer to project drawings for precise width. They can be as narrow as the door opening or as wide as the entire front wall of the hoistway.
Barricade each landing in accordance with OSHA Standards.Door Penetrations
Step 4: Site Prep - Build the Machine Room
If a modular machine room has been ordered, then you need only a slab and electrical stub-ups.
If you are building the machine room, provide for the following:
→ Ensure machine room floor is complete and level, room is dry, walls are complete and fire rated with the same rating as the hoistway.
→ Equip with overhead light, switch, and GFCI outlet.
→ Install exterior door that is a minimum of 29.5” wide (36” preferred), self-closing and self-locking.
→ Install electrical power, including disconnects (see Electrical section)
→ Provide for climate control if the natural environment will not maintain the machine room temperature between 50 and 100 degrees, and humidity less than 85%. This is required for the controller to work properly and by Rule 18.104.22.168.
Step 5: Schedule the Crane
Schedule the crane. Four hours is sufficient for a single tower, including setup and takedown. The crane size requirement depends on the elevator size and how far the crane has to reach to set it. For more details on sizing and rigging, as well as a video of a modular elevator being set, click the link below.Crane Info
Step 6: Install Electric
Provide four electrical stub-ups to the machine room.
→ Elevator power: 3-phase power, 208-480 volt dedicated circuit with lockable disconnect. Amperage requirements depend on project voltage and motor size. Contact us and we’ll provide job-specific starting and full-load amperage so that you can size the power feed and disconnect.
→ Car power (lights and alarm): 120 volt, 20 amp dedicated circuit with lockable disconnect.
→ Hoistway power (pit light and outlet): 120 volt, 20 amp dedicated circuit. Disconnect not required, as this can land directly into the controller.
→ Machine room power (light and outlet): 120 volt, 20 amp dedicated circuit. Ties directly into room light and outlet.
→ (Optional) PTAC unit power: If a modular machine room is ordered with a PTAC unit for climate control, it needs a 208/230 volt, 20 amp dedicated circuit, wired directly into the outlet.
Provide a dedicated phone line to the machine room. The installer will connect this to the ADA phone in the elevator car. When operational, this line must provide two-way communications that are monitored 24 hours a day. See Rule 22.214.171.124.
Step 7: Install Fire Life Safety
Install Automatic Fire Alarm Initiating Devices: As required by ASME A17.1 & NFPA – 72 or per local code.
Smoke Detectors: Install smoke detectors in each hallway and wire them to building electrical supply. They may also be required in the machine room and/or hoistway. See elevator layout drawings for smoke detector wiring requirements. The installer will make the final connections of the smoke detectors to the controller.
Fire Sprinklers: Local building codes may require fire sprinklers in the hoistway and/or machine room. If required in the machine room, you will also need a means to remove power from the equipment prior to sprinklers turning on (shunt trip). Consult your local code official for specific requirements. If sprinklers are required, they must be installed after the elevator installation is complete and must be installed in accordance with Rule 2.8.3 (ASME A17.1).
Hoistway Venting: IBC requires hoistway venting to the exterior for any building of more than three stories. Local jurisdictions may have additional requirements. See ASME/ANSI A 17.1. When required, PME supplies a dampered vent, which you will need to install and wire into building power.
Step 8: Complete Interior and Exterior Building Tie-Ins
Roof: Flash around the joint between the elevator and roof to prevent water penetration
Exterior: If elevator is on the exterior of the building, or protrudes above the roof, apply final finish. Hoistway standard exterior is fiberglass gypsum type X sheathing (Densglass or equivalent), so any building finish may be applied directly. Standard roof is EPDM or Duro-Last that is glued to the roof and tacked around the sides. After finish is applied to the walls, this should be terminated over the siding.
Interior: Any hoistway walls that are exposed on the interior may be taped, mudded and finished like any standard drywall. Tie hoistway walls into building walls and openings with drywall or expansion joints.
Floor: Install cab flooring. A ¾” allowance below the sill is provided. Extend building flooring to hoistway sill. An aluminum threshold plate is an available option.
Foundation: Flash bottom of hoistway to outside of pit wall, and bottom of machine room to slab.Tie In And Finishing
Step 9: Final Details
Ground the hoistway by means of the provided lug, located in the pit on the interior of the hoistway.
Install non-shrink grout under tower, jacks & buffer stands.
Patch any holes from piping and electrical wiring in the hoistway and machine room walls to meet applicable building code fire rating requirements.
Install a Class ABC fire extinguisher in the machine room. See Rule 126.96.36.199.5.
We hope that the information above will help you with the elevator installation. It is our goal to make the process as easy as possible. If you have any suggestions or questions feel free to contact us at your convenience.Contact Us