Integrated Structural and Foundation Performance Assessment of an SST-3L-52M-LIGHT Telecommunication Tower

Communication towers are slender infrastructure systems whose safety depends on the interaction of the steel lattice superstructure, connections, anchorage, and foundation. This study presents an integrated case evaluation of a 52 m three-legged self-supporting telecommunication tower (SST-3L-52M-LIGHT) located at the Tanjung Priok Access Toll Road Operational Office, North Jakarta. The structural model was evaluated in SAP2000 using SNI 1727:2020, SNI 1726:2019, and SNI 1729:2020. The assessment covered dead, live, and directional wind loads; compression-member capacity; bolted connections; base-plate and anchor-bolt resistance; and bored-pile capacity under compression and uplift, including a flood condition represented by a reduced effective concrete unit weight. To extend the single-case evaluation, directional comparison and wind-demand sensitivity analyses were conducted using three basic wind-speed scenarios while retaining the original geometry and aerodynamic coefficients. The y-direction wind demand was 56.69 kN, 15.46% higher than the x-direction demand of 49.10 kN, and the gravity-plus-y-wind combination (COMB4) governed the design. The critical L150×150×15 leg member carried 287.50 kN against a design compressive resistance of 652.71 kN, giving a utilization ratio of 0.44. The bolt group, base plate, and anchor system also satisfied their respective resistance checks. Under the flood-adjusted condition, the bored-pile system provided 422.44 kN compression resistance against 376.81 kN demand and 341.17 kN uplift resistance against 267.76 kN demand. Wind-demand scaling increased the equivalent y-direction load to 106.58 kN and 172.85 kN for basic wind speeds of 45.70 and 58.20 m/s, respectively. The study contributes a traceable superstructure-to-foundation assessment under a consistent Indonesian code framework, while explicitly limiting its conclusions to the evaluated geometry, loading assumptions, and geotechnical data.

telecommunication tower; steel lattice structure; wind-load sensitivity; connection design; bored-pile foundation

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