NESC-compliant structural analysis, make-ready design, and joint use attachment applications — the engineering work that has to happen before a single strand goes up on aerial plant. We've done this at scale across 22 states.
Pole loading analysis make-ready engineering determines whether existing utility poles can structurally support a new fiber attachment before construction begins. Analysis is performed using O-Calc Pro or SPIDA Calc, applying NESC loading district standards to calculate each pole's utilization percentage. Poles that fail compliance require rearrangements, guy wire additions, or full replacement before the fiber attachment application can proceed.
Here's the situation we see more often than we'd like: an ISP gets through HLD, starts the permitting process, and doesn't commission pole loading analysis until the construction crew is already scheduled. Then the results come back and there are 37 poles that need replacement, another 14 that need complex rearrangements, and two spans where the existing pole geometry means clearances can't be achieved without a full re-route. The schedule is now six months behind. The budget has a hole in it.
Pole loading analysis isn't a box-checking exercise — for a detailed walkthrough of how we run pole loading analysis with O-Calc Pro, see our technical overview. It's the engineering work that determines whether your aerial build is actually constructable as designed — and if not, what it takes to make it so. We run the analysis early, during or immediately after field survey, so that make-ready scope is known before construction contracts are signed. That's how you avoid the surprise.
For any aerial fiber deployment, the sequence has to be: field survey → pole loading analysis → make-ready design → attachment applications → make-ready completion → strand installation. Understanding the make-ready engineering timeline from the start is critical to keeping your build on schedule. Compressing or skipping steps in that sequence creates cost and schedule risk. Every time.
Pole loading analysis for fiber attachments involves field-verified data collection, structural modeling in O-Calc Pro or SPIDA Calc, NESC compliance calculation, and make-ready design for poles that fail. The process runs from field survey intake through attachment application submission — typically 3–6 weeks for a 200-pole project. Every pole is modeled individually; no blanket pass assumptions.
Loading analysis is only as good as the input data. Our field survey team captures existing attachment heights, span lengths, pole class and species, and visual condition using Katapult or IKE — GPS-tagged, photo-documented, and QA'd before it touches the loading tool. We're not estimating attachment heights from the road. We measure them. The difference between a field-verified 26.3-foot attachment height and an assumed 27-foot standard can change a loading result from 97% to 103% — one passes, one fails.
We build the pole model in the appropriate tool based on the pole owner's requirements — O-Calc Pro for most CLEC and ISP joint use applications, SPIDA Calc when the utility requires it. Every existing attachment goes into the model at the field-measured height and with the appropriate wire weight and diameter. We apply the correct NESC loading district (Heavy, Medium, or Light) for the project geography, plus the applicable wind speed from ASCE 7. No shortcuts on the input side.
The analysis runs the pole under design load conditions and produces a utilization percentage — the ratio of applied load to allowable capacity. NESC Grade B construction requires the pole to remain below 100% under the design loading scenario. We flag every pole at or above 90% — not just the ones over 100% — because anything in the 90–100% band is a risk item that deserves a second look before the attachment application goes in.
For poles that fail compliance with the proposed new attachment, we design the make-ready. That means specifying the exact rearrangement — which existing attachments need to move and where — or calling for a pole replacement with the required class and height. We also design any required guy wire additions or anchor upgrades. The make-ready design package is what the pole owner's crews or the attaching party's make-ready contractors work from in the field.
We prepare the complete attachment application package — loading analysis outputs, make-ready design drawings, wire and hardware specifications, and any utility-specific forms. We manage submission and track the application through the pole owner's review process, following up on delays and responding to engineering questions from the utility's joint use department.
On O-Calc's quirks: O-Calc Pro's loading module can be finicky when you have overlapping attachment heights from multiple attachers — particularly when one of those attachers has run cable at a non-standard height because they installed before the current NESC edition. We've learned to double-check any pole where the existing attachment spacing looks compressed. It's worth the extra thirty seconds per pole to confirm the model is representing the structure accurately.
Tool selection matters in pole loading work. Some utility pole owners require specific software for their attachment application process — a result they can't replicate in another tool won't satisfy their joint use department. We maintain active licenses and expertise across all the major platforms.
Our primary tool for telecom attachment analysis. Fast, widely accepted by CLECs and most co-op utilities, and integrates with Katapult field data via direct import. Best for high-volume analyses on projects with dozens to hundreds of poles.
Required by many investor-owned utilities (IOUs) in their joint use processes. More powerful geometric modeling for complex guy wire configurations and multi-height attachment scenarios. We use it when the pole owner requires it or when the structure warrants the additional precision.
Field data collection and photogrammetry platform. Our field crews capture pole geometry and attachment data in Katapult, which feeds directly into O-Calc Pro — reducing manual data entry error and speeding up the analysis phase significantly.
Mobile field collection for attachment surveys. We use IKE on projects where Katapult's full desktop workflow isn't required — quick attachment surveys on smaller pole counts where speed matters more than full GIS integration.
| Factor | O-Calc Pro | SPIDA Calc |
|---|---|---|
| Most commonly required by | CLECs, ISPs, telephone co-ops, municipal utilities | Investor-owned electric utilities (IOUs), large co-ops |
| Data import from Katapult | Direct integration supported | Manual entry or separate workflow required |
| Guy wire modeling | Functional, handles most cases | More granular — preferred for complex anchor setups |
| Volume throughput | Higher — better for 100+ pole projects | Slower per-pole workflow |
| Report format | Standard telecom joint use format | IOU-specific format — matches their internal review process |
Make-ready engineering converts pole loading analysis results into a constructable work order — specifying exactly which attachments must move, what replacement poles are needed, and what guy wire additions are required. The make-ready construction package is what pole owner crews and make-ready contractors work from in the field. Without it, fiber attachment applications cannot proceed.
Make-ready design is where pole loading engineering turns into a constructable work order. The goal is to get every pole in the project into a compliant state before the fiber installation crews arrive. Sometimes that's simple — an existing cable needs to move up six inches to maintain required separation. Sometimes it's complicated.
The worst make-ready situations we run into are on overloaded poles in old, dense plant — usually in older suburban neighborhoods where the telecom infrastructure went up in the 1970s and nobody has touched the attachment geometry since. We worked on a project in east Tennessee where a stretch of 0.8 miles had 11 poles at over 95% utilization with current attachments before we'd even modeled the proposed fiber. Four of those needed full replacement. The pole owner had no record of several of the existing attachments — they were just there, no paperwork. That kind of situation adds weeks to the schedule and is why thorough field survey matters so much upfront.
Make-ready work typically falls into four categories:
We coordinate with the other attaching utilities — phone company, cable, sometimes wireless — to schedule rearrangements so they happen in the right sequence. Electric utility make-ready has to happen before telecom make-ready. Telecom rearrangements have to be done before the new fiber attachment can go in. Managing that sequencing on a build with 400 poles and three utility owners is non-trivial.
Joint use pole attachment applications for fiber require submitting loading analysis results, make-ready design drawings, and attachment specifications to the pole owner's joint use department. FCC rules under 47 U.S.C. § 224 govern investor-owned utility poles; co-op and municipal poles follow state-level regulation. Review timelines range from 6 weeks to over a year depending on pole owner backlog and pole loading complexity.
Joint use is the legal and regulatory framework governing who can put what on a shared utility pole. The FCC's pole attachment rules (under 47 U.S.C. § 224) give telecom carriers the right to attach to investor-owned utility poles at regulated rates, but the process still requires application, review, and approval from the pole owner. Co-op and municipal utility poles are regulated at the state level and the process varies significantly by state.
For FTTH deployments, the attachment application process is typically the longest lead-time item in the entire project — longer than design, longer than permitting. We've seen utility review timelines range from 6 weeks to over a year on projects where the poles are heavily loaded and the utility's joint use department is backlogged. The FCC's One Touch Make Ready (OTMR) rules provide a faster path in many cases by allowing the attaching party to perform all make-ready work in a single visit, but not all pole owners have adopted OTMR processes and the rules have exceptions.
Read more about the upstream design decisions that affect make-ready scope in our breakdown of common FTTH HLD design mistakes — several of the most expensive ones show up directly in make-ready cost. And our detailed guide on pole loading analysis with O-Calc Pro covers the technical methodology in depth.
Our joint use team handles the full application workflow:
The permitting timeline and the make-ready timeline run in parallel on most aerial builds. The projects that stay on schedule are the ones where both tracks start on day one — not after the design is done. We can run field survey, make-ready engineering, and permitting applications simultaneously for clients who want to compress the pre-construction timeline.
NESC Rule 261 governs the structural loading requirements for overhead supply and communication lines. The loading grades — Grade B being the most common for joint-use utility distribution poles — define the design wind and ice loads that poles and attachments must withstand. Most pole loading analyses for telecom attachments are run under NESC Heavy, Medium, or Light loading districts depending on geography, plus the applicable overload capacity factors.
What trips up engineers who don't do this work regularly is the overload capacity factor (OCF). NESC doesn't just require the pole to be at 100% capacity under design loads — it requires the structure to carry the design loads while remaining within its strength limit. The OCF for Grade B construction means the attachment loads times the OCF factor have to stay below the pole's rated strength. A pole at 87% utilization under design loads might still be fine. Or it might not be, depending on the OCF applied to the load case. The math matters.
We also flag NESC clearance violations during loading analysis review — not just structural issues. A make-ready package that fixes the structural problem but ignores a vertical clearance issue between telecom and power is an incomplete package. We catch those before they go to the utility.
Pole loading analysis is a structural engineering calculation that determines whether a utility pole can safely carry its current attachments plus any new ones being proposed — under the design wind and ice loads defined by NESC. The result is a utilization percentage. If that number exceeds 100%, the pole can't support the new attachment as designed and either the pole needs replacing or the attachment arrangement needs to change. It's required before any new telecom attachment application on a jointly-used pole, and for good reason: a failing pole in a wind event is a safety hazard, not just an inconvenience.
The engineering itself — loading analysis, make-ready design, application package prep — typically takes 4–12 weeks depending on pole count and project complexity. The bottleneck is almost never the engineering. It's the utility's review timeline and make-ready scheduling. Realistic total timelines from field survey to completed make-ready on a standard aerial FTTH build run 4–9 months. On builds in territories with overloaded poles and slow utilities, 12–18 months isn't unusual. The projects that stay on schedule are the ones where make-ready engineering starts on day one of design, not after HLD is complete.
Both are NESC-compliant pole loading tools, but different utilities require different software. O-Calc Pro dominates in telecom-heavy joint use work — it integrates cleanly with Katapult field data and most CLECs and ISPs use it. SPIDA Calc is more commonly required by investor-owned electric utilities for their internal joint use review process. When a utility specifies which tool they require, you use that tool — there's no option. We maintain current licenses and expertise in both. If neither is specified, we default to O-Calc Pro for most projects.
The primary triggers are: (1) loading analysis showing the existing pole is already over 100% of rated capacity with current attachments, so adding fiber would make it worse; (2) the pole failing even after the best possible rearrangement of existing attachments; (3) physical defects found during field inspection — rot, cracks, excessive lean, or woodpecker damage; (4) height deficiency where the existing pole can't accommodate new telecom attachments at compliant clearances above power. Replacement is a cost item that needs to be in the budget before construction contracts are signed, which is why early loading analysis matters.
Joint use is the arrangement where multiple companies share the same utility pole — typically the electric utility who owns it, plus one or more telecom attachers. To add a new attachment, the telecom company submits a formal application to the pole owner with the proposed attachment details and a loading analysis showing compliance. The pole owner reviews it, specifies any required make-ready work, and grants or denies permission. FCC rules give CLECs and cable operators the right to attach to IOU poles at regulated rates, but the application and approval process still takes time. The full cycle — application to approval — typically runs 60–180 days.
Yes. We prepare the full application package, submit to the pole owner, and track the application through their review process. We follow up on delays, respond to engineering questions from utility joint use staff, and coordinate make-ready scheduling with multiple utilities when needed. Managing this back-and-forth across 300 poles with three utility owners is a real operational task — we handle it so your project management team isn't spending days a week on utility calls.
Tell us your route miles, approximate pole count, and the utilities involved. We'll scope the project and give you a timeline estimate. We've worked with most major utilities across the 22 states where we're active — if there's a process quirk to know about, we already know it.
Contact Our Engineering TeamEmail directly: info@draftech.com — we reply within one business day.