PE-stamped TIA-222 structural analysis for tower modifications, new tenant collocations, and equipment upgrades — feasibility and rigorous analysis types, delivered to carrier and tower company program standards. All 50 U.S. states. MBE-certified.
Every wireless tower — monopole, self-supporting lattice, guyed, or rooftop mount — has a structural capacity limit. That limit is calculated and documented under ANSI/TIA-222, the national standard for antenna supporting structures. Every time new equipment is added, existing equipment is replaced with a different model, or a new tenant is added to a tower, a structural analysis is required to confirm the structure can support the new loading. Tower owners including Crown Castle, American Tower, and SBA Communications require a TIA-222 analysis before authorizing any modification, and most carrier contracts specify the same requirement for their own infrastructure.
TIA-222 defines two analysis types: feasibility and rigorous. A feasibility structural analysis is a high-level review used early in the carrier decision process — before a site is committed to a program — to assess whether a proposed loading change is structurally viable without full connection-detail analysis. It answers the question of whether proceeding makes sense before the client invests in detailed engineering. A rigorous structural analysis is the full analysis required before any modification is executed. It evaluates every structural member, foundation, connection detail, and guy wire system under all applicable load combinations — wind (3-second gust, 50-year return), ice, seismic where applicable, and combined loading. Both analysis types require a licensed PE stamp on the report.
TIA-222 has been updated through multiple revision cycles. The current revision is TIA-222-H, which introduced significant changes to wind load mapping, ice load zones, and structural reliability factors compared to earlier revisions. Many towers in active carrier portfolios were analyzed under earlier revisions and require re-analysis under TIA-222-H when new equipment loading is added. Draftech's structural engineering team works under the current revision standard and can advise on upgrade analysis requirements for towers with legacy documentation.
High-level structural viability review for proposed equipment additions — used for carrier site screening and pre-commitment decisions before investing in full rigorous analysis.
Full TIA-222-H analysis of all structural members, connections, foundations, and guy systems under all applicable load combinations. PE-stamped report with supporting calculations.
3-second gust wind load calculations, ice load modeling, and combined loading per TIA-222-H wind and ice zone maps. Effective projected area (EPA) calculations for all proposed antennas and equipment.
Foundation capacity assessment for proposed loading — including spread footings, drilled piers, and anchor bolt systems. Geotechnical data review and foundation upgrade recommendation where required.
Seismic load analysis per TIA-222-H for structures in Seismic Design Categories B, C, and D — required for towers in earthquake-prone regions across the western and central United States.
Where analysis identifies deficiencies, Draftech provides structural modification recommendations — tower reinforcement options, equipment rearrangement to optimize load distribution, or capacity expansion alternatives.
| Analysis Type | Typical Turnaround | Primary Variables |
|---|---|---|
| Feasibility analysis — standard monopole | 2–4 weeks | Tower drawing availability, proposed loading data completeness |
| Rigorous analysis — monopole or guyed tower | 3–6 weeks | Structure complexity, foundation data, existing loading documentation |
| Rigorous analysis — lattice tower | 4–8 weeks | Member count, connection details, ice and seismic zone requirements |
| Re-analysis under TIA-222-H | 3–6 weeks | Existing analysis revision, extent of changes required under updated standard |
TIA-222-H: The current revision of the structural standard introduced updated wind speed maps based on ASCE 7-16, new ice load provisions, and revised structural reliability factors. Towers originally analyzed under TIA-222-G or earlier may show capacity deficiencies under TIA-222-H even without any new equipment loading — a common finding on older tower portfolios seeking new tenant authorization.
Crown Castle, American Tower, SBA Communications, and independent owners requiring structural analysis for new tenant authorization, equipment upgrades, and annual portfolio maintenance.
AT&T, Verizon, T-Mobile, and regional carriers requiring structural analysis for technology overlay programs — 5G equipment additions, antenna replacements, and C-band upgrade projects.
Cities and counties owning communication towers or reviewing carrier modification applications — requiring independent structural analysis or technical review of carrier-submitted documentation.
Rural wireless carriers and ISPs building new tower infrastructure or modifying existing structures for broadband service expansion — requiring TIA-222 analysis for new construction authorization.
A TIA-222 structural analysis is required any time equipment is added to, removed from, or changed on a tower structure in a way that affects the load profile. Common triggers include adding new antennas, installing new radio units or remote radio heads, adding mounts or platforms, upgrading to larger antenna models with different wind load areas, and any structural modification to the tower itself. Tower owners — Crown Castle, American Tower, SBA — require a structural analysis before authorizing any new tenant or equipment change on their structures.
TIA-222 defines two analysis types. A feasibility structural analysis is a high-level review that assesses whether a proposed loading change is viable without performing full connection-detail analysis. It is used early in the carrier decision process to screen structural viability before engineering investment. A rigorous structural analysis is the full analysis required before any modification is actually executed. It determines overall stability and adequacy of all structural members, foundations, connections, and guy wires under all applicable load combinations. Both types require a licensed PE stamp.
Feasibility structural analyses for standard monopoles and lattice towers typically complete in 2–4 weeks from receipt of tower drawings and proposed loading data. Rigorous analyses for complex structures or unusual loading conditions may require 4–8 weeks. Turnaround depends on tower data quality — incomplete or outdated tower drawings are the most common cause of analysis delays. Draftech reviews all input data before starting the analysis and flags data gaps early.
Whether you need a feasibility review for a new tenant colocation or a full rigorous analysis for a technology upgrade program, Draftech's structural engineering team delivers PE-stamped TIA-222 analysis to carrier and tower company standards. All 50 U.S. states. MBE-certified.
Request Structural AnalysisOr email us at info@draftech.com — we reply within one business day.
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