Making Elevating Construction Surveyors, Part 4, Feat. Brandon Montero

Ten Principles Every Construction Surveyor Needs to Master: From Tolerances to Flow

Survey work sits at the beginning of everything on a construction project. When it is done correctly, every trade that follows has a reliable foundation. When it is done carelessly, every trade that follows absorbs the error, and the cost compounds with every layer of work that is added on top. Jason Schroeder and Brandon Montero are developing a book called Elevating Construction Surveyors, and this episode is a raw recording session of ten foundational principles from that book. Together they walk through the concepts that separate surveyors who produce dependable, production-enabling work from those who get through the day without ever understanding what their work means to the people who build from it.

Envision the Tolerance Before You Start

Every survey task has a tolerance, and the first discipline is knowing what that tolerance actually is before equipment is set up and observations are taken. Not every task requires the same precision. The curb machine following a layout does not respond to the level of detail that a structural grid line demands. If the equipment and methods selected for a task consume more than half of the available tolerance, the crew is left with nothing to work with.

A best practice is to use no more than half of the available tolerance on any given task. But applying that rule requires knowing the tolerance, understanding the logic behind it, knowing what equipment will follow the layout, and selecting methods that leave meaningful margin. Brandon Montero frames it directly: do you know what the tolerance is for each task you are performing? Have you questioned it? Do you understand why it exists? Those are the questions that should precede every setup on every site.

Know What Your Equipment Actually Measures

Equipment specifications tell the real story, and most field surveyors do not read them closely enough. A total station that displays zero does not mean perfect. It means zero within the accuracy range stated in the specifications, which may be plus or minus three seconds or five seconds in either direction, even when perfectly calibrated. A prism pole bubble vial rated at 40 minutes means the rod is plumb within that range when the bubble is perfectly centered. The display says one thing. The physics say something more.

Brandon’s point is clear: there is always more to the story. When a resection resolves to 0.00, the question is whether the instrument is actually capable of measuring to that precision. When a GPS instrument reports a horizontal position better than a hundredth, the question is whether the specifications of the instrument support that claim or whether the reading is rounding to the nearest displayed decimal. Understanding equipment capability is not optional. It determines the methods required to achieve the needed accuracy.

Everything Should Have a Double Check

This principle is not about distrust. It is about the reality that mistakes happen in field work and the best crews build verification into their process so that mistakes are caught before they become problems downstream. A tape measure is available for distances under 25 feet. A steel tape works for distances under 100 feet on clear, flat ground. Measuring from a different direction, using different equipment, or having another crew member re-observe the work are all valid double check methods depending on the site conditions and the distance involved.

Brandon describes a training situation at a boot camp where a total station with a systematic error was outputting bad distances in the 22-foot range. The crew spent significant time confused about which shot was correct. The fix was available the entire time: turn an angle, sight the instrument, pull a tape on flat ground. A 90-second double check would have resolved the issue immediately. The habit of asking, at every step, what is my double check for this, is what produces error-free field work over a career.

Define the Best Practice and Never Deviate From It

A best practice is a process built by taking instrument capability into account, selecting the appropriate double checks, and ordering the steps to eliminate wasted time and motion. When a best practice is identified for a task that requires special accuracy, it should become the standard every time, with no deviations, regardless of experience level.

Brandon’s observation from his own career is worth holding onto: his history of not making mistakes is not the result of exceptional talent or photographic memory. It is the result of following best practices religiously and never giving himself permission to skip the fundamentals because he has enough experience to feel confident without them. Experience is not an excuse to skip the double check. A best practice that has been proven effective should be applied identically every time it applies. The question for any survey department is whether best practices have been defined, and whether they are being shared and applied consistently across the team or whether each person is reinventing the process on their own schedule.

Use the Data Collector to Its Full Capability

Data collectors have evolved to the point where very little that can be done in a CAD drafting platform cannot also be done in the field. Rod busts can be corrected by editing a single line in the raw data without reshooting. Distance offsets, curve calculations, resections, and topographic recording all have dedicated workflows in the data collector. The surveyor who does not know these tools is overworking every situation that they could have resolved in moments.

Beyond the immediate productivity gain, learning the data collector is the most direct pathway to learning the drafting platform. The interfaces are increasingly similar. The operations mirror each other. A field surveyor who becomes proficient on the data collector arrives at the drafting platform already familiar with the logic of how calculations are structured and how data flows through a COGO system. The challenge: browse through menus, explore what tools are available, and let those discoveries generate the questions that drive the next level of learning.

Traverse Your Primary Control

Here are the signs that site control is not good enough for the work being built from it:

• Backsights that close within 0.018 feet are accepted without questioning whether the control points themselves agree with each other
• Multiple control points float by three-hundredths or more relative to each other, but no traverse has been run to establish their true relationship
• Buildings on a multi-building site are laid out from different control points that have never been mathematically tied together
• The tolerance for layout is tighter than the accuracy of the underlying control

Traversing primary site control is not a step that can be skipped when the work requires precision better than the accuracy of individual observations. Running a traverse, adjusting it using a compass rule or least squares approach, and establishing the true mathematical relationship between all control points on the site is what gives the surveyor confidence that everything laid out will tie together across the full extent of the project. Without it, a third party’s control is accepted at face value, buildings may not align at their interfaces, and the surveyor has no basis for knowing which point to trust when observations do not agree.

Record As-Builts With the Same Accuracy as the Original Installation

As-built records are only as useful as the accuracy and completeness of the observations that produce them. A shot at the beginning of a pipe run and a shot at the end tells the person drawing the exhibit where the pipe starts and where it ends. It does not tell them about the bends, the dips, the T intersections, or the points where the pipe transitioned from exposed to buried. Brandon’s challenge for as-built recording: envision the work as a 3D picture being drawn with a pencil. Everywhere the pencil goes down, changes direction, or lifts off the page needs a shot or a description that documents what happened. If a sketch cannot be drawn from the data collected, the as-built is insufficient.

High-quality as-builts prevent hit utilities on future projects, enable renovations without guesswork, and give owners accurate records of what was actually built. Poor as-builts pass the cost of that uncertainty forward to every project that follows.

Draft on Your Own Work to See Its Gaps

The most direct way to understand what is missing from field observations is to sit down and connect the dots yourself. When a surveyor drafts their own topographic survey or their own as-built exhibit, they discover immediately where the data is insufficient to draw a complete, accurate picture. Where the curve does not appear smooth because there were not enough shots along the arc. Where the grade break is missing because no one shot the line of transition. Where the utility terminates on paper but the physical field reality continues off the edge of the collected data.

Surveyors and drafting technicians should speak directly, without a middleman. The feedback that flows from that conversation is what sharpens field methods over time. If the drafting technician is quietly smoothing over rough work without saying anything, the field surveyor never learns what is needed. Cut out the buffer. Ask for direct feedback. Draft your own work when possible. The gaps will be obvious, and obvious gaps get fixed.

Flow as a Two-Person Crew

On a two-person crew, neither person should ever be waiting on the other. When the instrument person is performing calculations on the data collector, the Rodman is QC-ing the cut-fill on the last lath, pre-writing the next one, walking out to the next point, and arriving with nail and hammer ready as the instrument person gets close to the target. When the instrument person moves to the next setup, the Rodman is not following. The Rodman is already at the next point.

Flow means constant activity, no wasted motion, no starts and stops, and no one with their brain in the off position while someone else works. A crew that has achieved this rhythm covers ground at a rate that a crew where one person follows the other cannot match. Brandon’s application: ask yourself whether each person on the crew has everything they need to flow. Both people carry what they need. Both people have copies of the staking exhibit. Both people are thinking about the next point while the current one is being processed. If one person’s work is consistently out of balance with the other’s, flow is not happening.

Create Exhibits That Anyone on the Project Can Understand

The exhibit is the ultimate deliverable of a survey task. Whether it is a field book sketch or a CAD-produced exhibit, it should convey not just the specific data requested but the surrounding context that allows anyone on the project team to understand exactly what is being shown, where on the site it is located, and what the data means. Exhibits from field work often travel far beyond the original requester. They end up in front of the structural engineer, the architect, the trade partners, and the owner. Every one of those people should be able to open the exhibit and understand it without needing to call the surveyor for explanation.

If an exhibit conveys a potential discrepancy, it may end up in a project-wide discussion. That is the moment when a clear, well-labeled, professionally formatted exhibit reflects directly on the credibility of the survey work and the surveyor. The responsibility does not end when the instrument case is shut. It ends when the information has been clearly communicated to everyone who needs it. If your project needs superintendent coaching, project support, or leadership development, Elevate Construction can help your field teams stabilize, schedule, and flow.

Do Work That Earns the Trust of Everyone Who Follows You

Survey work sets the foundation for everything that follows on a construction project. Every tolerance decision, every double check, every best practice applied without deviation, every traverse run to establish true control, every as-built recorded with sufficient detail, and every exhibit created with enough care to be understood by anyone who reads it: all of that is an act of professional responsibility toward every trade, every engineer, and every family whose project you are building. The surveyor who approaches the work that way does not just do their job. They make everyone else’s job possible. On we go.

FAQ

Why is knowing the tolerance of a task the starting point for good survey work?

Because the tolerance determines the methods required. If the available tolerance for a wall placement is half an inch, but the survey methods being used consume more than half of that tolerance through inherent equipment error, the crew is left with no margin for any variability in the construction process. Understanding what tolerance is available, what equipment will follow the layout, and how much of the tolerance to use for the survey work itself is the foundational question that shapes every decision about methods, equipment selection, and level of effort. Using no more than half of the available tolerance on any task is the best practice that protects the work for the trades that follow.

What does it mean to double check in survey work, and why is it non-negotiable?

A double check is any verification of a measurement or observation using a method different from the original one. It might mean measuring a distance from a different direction, using a tape measure as a secondary verification of a total station shot, having a second crew member re-observe a critical point, or comparing field data against plan set information before moving on. The purpose is to catch errors before they propagate into the work that follows. Without double checks, mistakes that would have been caught in thirty seconds become problems that cost days of rework. Every task, regardless of experience level, should have a defined double check built into the process.

What is the difference between a best practice and just doing the task?

A best practice is a process that has been deliberately designed by taking instrument capability into account, selecting the appropriate double checks for the task, and ordering the steps to eliminate wasted time and motion. It is repeatable, reliable, and proven to produce accurate results consistently. Just doing the task means completing the observable steps without necessarily understanding why they are sequenced that way, which checks are essential versus optional, or how the task’s outputs will affect the work that follows. A best practice can be taught, shared, and applied by any qualified member of the team. A personal method based on habit cannot be easily transferred and may contain embedded errors that no one has questioned.

Why should surveyors traverse primary control rather than accepting individual observation data?

Because single observations between control points do not establish the mathematical relationship between all of the points on the site. If two control points do not agree with each other by three-hundredths, and no traverse has been run to determine which one is more accurate and what their true spatial relationship is, then every building laid out from different control points may fail to tie together at their interfaces. Traversing the primary control, adjusting the traverse, and establishing the true relationship between all control points gives the surveyor a reliable foundation and the ability to know, when observations do not match, which point to trust.

What makes a survey exhibit intelligent rather than just sufficient?

An intelligent exhibit conveys not just the specific data requested but the surrounding context that allows any member of the project team to understand what is being shown, where on the site it is, and what the data means. It uses clear, concise descriptions. It shows the relationship of the data to recognizable site features. It is formatted and labeled in a way that a structural engineer, an architect, or a trade partner who was not present for the field work can open the exhibit and understand it without calling the surveyor. Survey exhibits often travel far beyond their original destination. Creating them with the care and clarity that reflects the precision of the field work is a professional responsibility, not a secondary concern.