Erecting antenna masts, climbing structures, handling lithium batteries, and working in high-voltage or storm environments introduces lethal physical hazards.
No radio game, territorial hex, or high-altitude repeater is worth injury or death. Strict compliance with these safety protocols is required for all MESHFALL participants.
1. Tower & Mast Safety: Do Not Become a Casualty
Power Lines Kill: The 2X Clear Zone Rule
The Invariant Rule: Never install an antenna, mast, guy wire, or halyard within a horizontal distance equal to twice the total assembled height of the mast from any overhead electrical transmission line, transformer, or utility service drop.
If a mast buckles, slips, or drops during installation or storm conditions and bridges an overhead electrical line, the operator holding the mast is electrocuted instantly and fatally.
Climbing & Working at Heights
- Never Climb Alone: Always ensure at least one spotter is stationed on the ground to assist and call emergency services if an incident occurs.
- Certified Fall Arrest: Always utilize an OSHA-compliant full-body fall-arrest harness, certified positioning lanyards, and hard hats. Never use worn ropes, tow straps, or makeshift harnesses.
- Tree Pulley / Halyard Alternative: If you cannot climb safely, hoist your antenna into high tree limbs using UV-resistant paracord on a pulley system rather than risking a dangerous ladder or free-tree climb.
Structural Guying & Wind Loading
- Masts exceeding 15 feet must be securely guyed in three directions (120° radial separation) using UV-resistant Dacron, Kevlar cord, or galvanized aircraft cable.
- Anchors and hardware must be engineered to withstand 70+ MPH storm wind gusts typical of the Blue Ridge Escarpment.
2. Lightning Mitigation & Fire Prevention
Putting a metal rod high into the skyline creates an electrostatic drain point and an active target for cloud-to-ground lightning strikes:
Coaxial Lightning Surge Protectors
- Install an inline Gas Discharge Tube (GDT) surge arrestor (e.g., Alpha Delta, PolyPhaser, or Times Microwave) on the coax cable immediately before it enters any building or electronics enclosure.
- The arrestor body must be bonded directly to an outdoor earth ground rod.
Earth Grounding System
- Drive a dedicated 8-foot copper-clad steel ground rod into undisturbed soil at the base of the mast.
- Connect the mast base and surge arrestor to the ground rod using heavy, solid copper wire (minimum 6 AWG).
- Run in Straight Paths: Lightning will not make sharp 90° bends; route all ground leads in smooth, gentle downward paths.
NEMA Enclosure Fire Safety
- House electronics in NEMA 4X / IP66-rated weatherproof enclosures with breathable membrane vents (Gore vents) to prevent internal condensation and hydrogen gas build-up.
- Automotive Inline Fusing: Always install an automotive-grade inline fuse (1A to 2A fast-acting) directly on the positive battery lead within 2 inches of the cell terminal. If moisture bridges a PCB or a component shorts, the fuse blows instantly before the battery can ignite your enclosure.
Severe Weather Operating Protocol
- Cease Maintenance During Storms: Never climb, adjust, or touch outdoor antennas during an active thunderstorm watch or warning.
- Static Shock Warning: Atmospheric static build-up on an ungrounded antenna prior to rainfall can accumulate thousands of volts of static charge, delivering severe shocks even without a direct lightning strike.