Nothing Bears on the Deck.
Everything Reaches the Steel.

A roof gives a mount height, a clear horizon and a footprint that costs the site no ground. It also puts a repeated, dynamic reaction into a structure that was designed for snow and wind and not for this. So the Roof Mount is defined from the load path upward: the building's own engineer of record reviews the building's capacity for the mount before anything else is drawn, and the mount is fitted to what that review allows.

Above the interface, nothing is new. The tube module is the launch platform's own: Ø90.00 mm on the bore, 3.00 m of stroke, 30 bar behind it, one normally closed breech per barrel with a port of at least 95 cm² opening in under 5 ms. A round is 1.600 kg and leaves at 189.2 m/s. The sensing, the arm chain and the sector cam set are the line's, and they are on CDNS Institutional.

The chain runs mount → dunnage frame → posts through curbed roof penetrations → the building's primary steel or columns. The frame is through-bolted to steel or cast in to concrete, and the curbs are flashed so the membrane and its warranty survive the penetrations. Where the mount is a single slewing head rather than a skid, the stool that carries it sits directly over a column, and the load is concentrated where the building is strongest.

Screw jacks of the kind the ground machine stands on are a levelling device, not an anchorage: they set a frame true and they do nothing against uplift or against a reaction that reverses. A mount standing on jacks on a roof deck is not a configuration this design carries. On a roof the frame is anchored, and the loads it is anchored against include the shot, applied repeatedly and dynamically into the building's lateral system.

The two are not close in mass. The skid architecture sets a thirty-two-tube array on a steel dunnage frame long enough to carry it onto roof columns, of the order of 800 kg on its own, and spreads the whole of that across more of the building. A slewing head with its bearing, drives, a short stool and a spreader grillage runs from 1,159 kg at six tubes to 2,257 kg at sixteen, and it lands over one column. On most buildings that difference is the decision.

Beside the shot sit the loads a roof always has: dead load, snow drift against the unit, wind uplift, and seismic anchorage of rooftop equipment, all to the National Building Code as the province adopts it. Two things are open engineering and are named rather than left out: what the shot does as vibration in the floors below, and the building's own capacity for all of it, which is the building engineer's to establish. The mount is not designed around an assumption about either.

Standing a mount high lengthens the reach of a low lay, so the survey a roof needs is larger than the one the same machine needs on the ground, and the sector cam set that comes out of it is narrower. A canopy carried in the round is under engineering as a round option, and it does not stand in for the survey: it works on steep lays only, it drifts on the wind across a footprint as large as the ballistic one, and a canopy that fails to open leaves a ballistic miss. The option and what it costs are set out on the line page.

Azimuth runs to ±170° with a rear dead zone, elevation from −3° to +75°, and both axes report from absolute encoders referenced to a stored boresight offset. A pod of six to sixteen tubes carries far more inertia than the four-tube cradle the reference drive figures were written for, so the drives are sized to the pod and the brakes are sized to the shot. Design brake torque is twice the worst shot torque of the configuration fitted: 6.5 kN·m for a sixteen-tube centred pod, and 24.7 kN·m for twin eight-tube pods carried half a metre either side. The full table is on the Pedestal Mount.

The rest of the schedule is the launch platform's, with the line's additions. At each use: the interlocks, the stop and the breech fail-closed. Monthly: harness and slew checks. Quarterly: compressor service and breech seal inspection, with seals logged by shot count. On the certificate: the vessel hydrotest and the relief proof, and a lapsed certificate takes the mount out of service. Added here: sensor window cleaning, dryer and desiccant service, a cam-set inspection and seal check, a brake holding test, a tilt-switch check and a test of the uninterruptible supply.