Single-Pylon Architecture with Compression-Locked Cross-Arm Joints
Extends the Architectural Framework into single-pylon configurations for distribution and transmission tower deployment. Cross-arms are captured at engineered pylon segment joints through mating half-circle cutouts in adjacent segments, structurally compression-locked by the tubular tension architecture without bolts, welds, or separate fastening hardware.
Conventional electrical distribution and transmission infrastructure relies on two principal pole and tower technologies, each with significant limitations. Wooden poles, used predominantly for distribution-scale applications, suffer finite operational life, vulnerability to bushfire and rot, requirement for chemical preservatives that contaminate surrounding soil, and limited structural capacity. Steel lattice towers, used predominantly for transmission-scale applications, are constructed from hundreds of bolted lattice members assembled at the tower location, requiring substantial site assembly time, specialised high-rigging crews, and tower-by-tower assembly that does not parallelise efficiently along corridor length.
Existing precast concrete pole and tower technologies — used in wind turbine, communications tower, and certain extra-high-voltage transmission applications — share common architectural limitations: tendons routed through dedicated internal channels in segment walls; cross-arms attached by bolted, welded, or bracketed connection systems at the cross-arm-to-pole interface; segment-to-segment joints connected by bolts, grouting, or structural adhesive; construction methodologies requiring either tendon presence during placement or specialised joint connection operations during placement.
The Pole and Tower Architecture establishes a single-pylon configuration with compression-locked cross-arm joint architecture. At engineered pylon segment joints designated as cross-arm joints, the upper face of the lower pylon segment and the lower face of the upper pylon segment each comprise a half-circle cutout. The two cutouts mate together to form a circular cavity at the segment-to-segment joint. A cross-arm with an expanded central hub is placed at the cross-arm joint with its hub seated in the lower segment cutout; when the upper segment is lowered onto the lower segment, the cross-arm hub is captured within the circular cavity formed by the mating cutouts.
The cross-arm hub comprises a central hole oriented vertically, accommodating passage of the tubular tension column through the hub. When the tubular is tensioned (per the Integrated Foundation patent), the entire pylon stack is pre-loaded in compression. The cross-arm hub is compressed between the upper and lower pylon segments. The cross-arm is held in position by three independent constraints: geometric constraint (hub geometry exceeds the cross-arm beam cross-section, preventing lateral displacement); compressive constraint (tubular tension pre-loads the stack, compressing the hub between segments); and tubular constraint (tubular passes through the hub, preventing displacement perpendicular to the tubular axis).
The triple-constraint compression-locked cross-arm joint architecture eliminates bolts, welds, brackets, and any separate fastening hardware at the cross-arm-to-pylon interface. The cross-arm replacement methodology during operational life is enabled through partial pylon disassembly and reassembly using the same modular architecture and crew skills as initial construction, without lateral extraction of the cross-arm against the compression-fit.
The drawing below illustrates the architectural primitives covered by this patent. Engineering specification and full claim language are available to qualified parties on direct request.
The pole or tower is constructed by a two-phase methodology. In the first phase (dry pylon assembly), the Foundation Core is in place at the deployment location and modular precast pylon segments (per the Architectural Framework patent) are stacked vertically using the pin-and-box joint architecture. Cross-arms are placed at engineered cross-arm joints during stacking — each cross-arm is seated in the half-circle cutout of the lower segment with its central hub oriented vertically, then the upper segment is lowered onto the lower segment, capturing the cross-arm hub within the circular cavity formed by the mating cutouts.
The first phase produces a complete dry-assembled pylon stack with all cross-arms captured at their engineered positions, terminated at the upper end by a pylon cap. The dry stack is held together by gravity and the pin-and-box joint geometric constraints; no tubular is yet present in the structure.
In the second phase (tubular installation and tensioning), a workover platform is lifted to the pylon top by crane. The tubular tension column is assembled in sections at the workover platform and lowered through the pylon stack interior, threading downward through every cross-arm hub in coaxial sequence to the cutter head anchor at foundation depth. The tubular latches into the anchor termination. Hydraulic tensioning equipment at the workover platform tensions the tubular, pre-loading the entire pylon stack in compression and compression-locking the cross-arms at their engineered positions.
The architecture is scale-independent. Distribution-pole deployments use small-diameter pylon segments and modest cross-arm configurations. Medium-transmission deployments use larger pylon segments with multi-circuit cross-arm configurations. Ultra-high-voltage transmission deployments use the largest pylon segments with engineered cross-arm spacing for clearance and electromagnetic compatibility. The architectural primitives — modular precast segments, pin-and-box joints, half-circle cutouts, tubular-passage cross-arm hubs, two-phase construction — remain constant across the full scale range.
The MMC Patent Family is an integrated platform; each patent in the family connects to the others. The patents most directly related to this one are:
All seven patents in the MMC Patent Family are Australian sovereign intellectual property. The architecture is offered to a global consortium structure that licences the standard to deploying nations and host industries. Engineering specification and full claim language are available to qualified parties on direct request via contact.