Construction sites are the hardest RF environment in commercial radio: rebar and concrete absorb signal, steel skeletons reflect it, diesel generators raise the noise floor, and the radios themselves get dropped into mud. Choosing on advertised range alone is the classic mistake. Here is what actually matters.
1. Range: trust obstructions, not miles
A 5-watt UHF handheld is line-of-sight for miles, but indoors or behind structures expect 0.5–1.5 km per hop. For multi-storey builds, UHF penetrates concrete better than VHF. If the site spans more than a city block or has basements, budget for a repeater — one repeater typically covers an entire mid-size site.
2. IP rating: dust is the killer, not water
Concrete dust infiltrates speakers and potentiometers. Specify IP54 minimum; IP67 units survive full immersion and daily pressure washing. Every radio rated IP54+ in our two-way radios catalog lists its rating on the product page.
3. Battery: size for the shift, plus 30%
A 10–12 hour shift with heavy transmit duty needs a 2000 mAh+ Li-Ion pack; 1500 mAh units are fine for supervisors who talk less. Buy a spare battery and a multi-unit charger per crew so radios never start a shift half-charged. Rated for 500+ cycles, quality packs last 18–24 months of daily use.
4. Power and band: 4–5W UHF is the sweet spot
4–5 watts UHF (400–470 MHz) is the standard for construction: enough punch through structures, legal for business use with an FCC license, and compatible across brands. Sub-2W FRS radios are toys on a real site.
5. Licensing in one paragraph
License-free FRS/GMRS works for small crews but caps power and is shared with the public. Most contractors operate on business UHF under an FCC Business/Industrial pool license — a one-time, low-cost license covering the whole fleet for 10 years. Your radio dealer can recommend frequency programming; we pre-program radios to your licensed frequencies on request.
Sizing the fleet
| Crew size | Recommended pack | Notes |
|---|---|---|
| 5–10 workers | 10-unit bulk pack | 1 spare per supervisor |
| 10–30 workers | 20–30 unit pack + multi charger | Add speaker mics for noisy zones |
| 30+ / high-rise | 50-unit pack + repeater | Program multiple channels per trade |
Complete packages ship in our bulk packs — radios, spare batteries and chargers bundled at wholesale pricing. Pair every radio in dusty zones with a remote speaker mic to keep the radio pocketed and clean.
Accessories that pay for themselves
- Speaker mics: hear calls over machinery; radio stays clipped away from dust
- Chest packs/holsters: radios stop falling from ladders — see holsters & chest packs
- Spare batteries: zero downtime during shift change
How many two-way radios do I need for a 20-worker construction site?
Plan for one radio per on-site worker plus 10–20% spares: about 22–24 radios for 20 workers, with a multi-unit charger. Supervisors typically carry a spare battery as well.
Do construction radios work indoors and in basements?
UHF radios penetrate concrete better than VHF and work on most floors. For deep basements or towers with dense rebar, add a repeater on the top floor — that typically covers the whole structure.
What IP rating should a construction radio have?
IP54 is the practical minimum against concrete dust and rain. IP67-rated radios survive drops into water and pressure washing and are worth the premium on heavy-civil projects.
Ready to equip a crew? Get a wholesale quote — bulk pricing starts at 10 units, with fast US shipping.