Construction turnstiles are physical entry barriers that admit one credentialed worker at a time, and badge readers are the devices that verify the credential before the barrier releases. Together they turn a gate into a controlled entry point that records every entry and exit rather than relying on a sign-in sheet.
A turnstile is a physical barrier that permits one person to pass at a time, releasing only when a valid credential is presented. On a jobsite it converts an open gate into a controlled entry point, so the access list is enforced physically rather than by observation.
Turnstiles and readers do different jobs. The reader verifies identity and makes the decision. The turnstile enforces it. A reader on its own records who scanned but cannot stop anyone walking past. A turnstile without a reader is a gate with extra steps.
Turnstiles sit inside a broader access control program. They enforce the credentials that badging creates, and they generate the entry and exit events that produce headcount, hours, and gate traffic records.
Readers differ in how they read a credential and how close it has to be. Most construction badges carry more than one technology so a single credential works across different equipment.
Throughput is people per minute per direction, and it determines how many lanes a jobsite needs. Work backward from peak headcount. A 600-person crew at a single lane running 20 people per minute takes 30 minutes to clear, and that half hour repeats every morning for the life of the project.
Turnstile power requirements come down to three things: the voltage and circuit the unit needs, what it draws in operation versus standby, and what happens when power is lost. Battery backup determines whether an outage leaves a locked, monitored entrance or an open gate.
Many jobsites begin with no network at all. Where the access decision is made separates products. If it happens in the cloud, a dropped connection stops the gate. If it happens on the device, entry continues and events sync when the connection returns.
An IP rating describes resistance to dust and water. Construction turnstiles live outdoors in weather that indoor equipment is not built for, and galvanized steel construction matters for the same reason.
UL 294 is the standard for access control system units, and CAN/ULC S319 is its Canadian counterpart. On projects where the owner runs a formal security review, listed equipment is often a requirement rather than a preference.
Deployment method is the specification most often overlooked and most often regretted. A unit requiring anchor bolts, a concrete pad, and an electrician is effectively permanent. On a jobsite where gate layouts change through the phases, that turns every relocation into a project.
The Sitemetric Deluxe Turnstile is a full-height access control system built for active jobsites, with the reader and controller factory-integrated so there is no field wiring at installation. It reads the same Sitemetric badge used everywhere else on the project. More than 1.5 million workers across 40 states are on the Sitemetric platform, including 90% of the top 20 ENR contractors.
Divide peak crew size by throughput per lane. A Sitemetric turnstile handles 15 to 30 people per minute per direction, so a 600-person jobsite at 20 per minute clears in about 30 minutes through a single lane. Most projects add lanes to bring shift change under 15 minutes, and separate worker entry from vehicle and delivery access entirely. Talk with the Sitemetric team for turnstile deployment advice tailored to your jobsite.
Not all of them. Sitemetric turnstiles mount on a forklift-ready diamond plate base and require no anchor bolts, concrete pad, or permanent infrastructure. This matters more than it sounds, because gate layouts change as a project moves through excavation, structure, and fit-out, and a permanently mounted unit turns each of those changes into a construction task.
On a Sitemetric turnstile, both scenarios are covered. An integrated UPS provides up to two hours or 2,000 rotations with automatic switchover, keeping the unit locked and monitored. Access decisions are made on the device rather than in the cloud, so entry continues and events keep logging through a connectivity loss and sync when the connection returns.
It depends on the credential. Sitemetric turnstiles include NFC reader support to ISO 14443 and ISO 18092, which covers both card and mobile credentials. Badges printed on the Sitemetric Onsite ID Printing Station also carry barcode and QR encoding for turnstile and reader access with no separate encoder step.
A full-height turnstile is not an accessible route. Projects using them generally need an alternate accessible entry alongside, ideally one that reads the same credential and records the same access event so the entry record stays complete. Plan the accessible entry at the same time as the turnstile lanes rather than after.
UL 294 is the standard for access control system units, with CAN/ULC S319 as the Canadian equivalent. Sitemetric turnstiles are UL 294:2018 Listed, CAN/ULC S319 Certified, FCC Part 15 compliant, and manufactured in the USA. On projects where the owner runs a formal security review, listed equipment is often required rather than preferred.
Anti-passback controls prevent a credential from being used to enter an area twice in a row without a valid exit, so a badge cannot be passed back through the fence. Duplicate scan activity is separately reported so repeat patterns can be reviewed.
Sitemetric turnstiles arrive ready to deploy with no field wiring, and include a dry contact interface compatible with 12/24VDC access control systems for integration with equipment already onsite.
Talk with our team about your jobsite needs and learn how Sitemetric can help your project succeed.
