A wire exit is easy to overlook because it occupies only a small area on the back of a channel letter, yet it can determine whether installation takes a few predictable steps or turns into hours of drilling, rerouting, resealing, and field modification. A letter can have the correct face color, return depth, LED layout, dimensions, mounting studs, and illumination, but still create a serious installation problem if its cable exits over a steel member, behind an inaccessible wall cavity, beside a stone joint, or far from the planned power route.
The correct wire exit position is the location that allows the internal low-voltage wiring to leave the channel letter, reach the planned electrical route, remain hidden after installation, avoid mounting hardware and structural obstacles, and support proper waterproofing and future service. It should be confirmed together with the mounting method, wall condition, power-supply location, installation template, cable route, and site access before production begins.
This matters most when the factory and installer are in different locations. Once finished letters have been painted, wired, tested, packed, shipped, and lifted into position, moving an exit by even a small distance can become expensive. A five-minute drawing revision made before fabrication is usually far easier than opening a completed letter on site two days before a store opening.
What Determines the Best Wire Exit Position?
The best wire exit position is determined by the complete installation system rather than the center of the letter alone. Wall construction, internal LED layout, mounting points, available power route, letter geometry, cable length, waterproofing, and service access should be reviewed together. A position that is convenient during fabrication can still become difficult or unusable when the finished letter reaches the building.
Wall and Building Conditions
The wall should be treated as part of the channel letter system because the cable must continue somewhere after it leaves the letter. Concrete, brick, stone, drywall, timber, metal cladding, insulated panels, composite façades, and curtain-wall systems all create different limitations. A cable point that works well on an interior hollow wall may be completely unsuitable when the same letter is mounted over structural steel, stone joints, waterproof membranes, or dense façade subframes.
Before the wire exit is finalized, the project team should gather as much reliable site information as possible. Useful information includes the wall material, accessible cavities, known structural framing, existing electrical routes, plumbing, façade panel joints, glass areas, waterproofing layers, intended anchor points, and the amount of rear access available to the installer. iduoduo’s installation documentation also identifies concealed services, studs, curtain-wall structures, glass, templates, power access, and anchor depth as conditions that should be checked before drilling.
| Site Condition | What Should Be Confirmed | Main Installation Risk |
| Concrete or masonry | Drillable area and cable retrieval route | Difficult drilling or inaccessible cable |
| Hollow drywall | Stud position and cavity continuity | Wire exit lands directly on a stud |
| Metal cladding | Rails, panel seams and insulation | Conflict with façade substructure |
| Stone façade | Joints, anchors and waterproofing | Cracking, chipping or sealing difficulty |
| Curtain wall | Approved penetration areas | Waterproofing or structural conflict |
| Exterior wall | Sealing and drainage path | Water entering behind the façade |
| Limited rear access | Alternative connection method | Electrical connection cannot be reached |
Outdoor installations need another level of attention because every penetration can become a water path. The cable hole, mounting holes, wall finish, sealant, drainage direction, and building waterproofing cannot be reviewed as unrelated details. A clean-looking sign that allows water to migrate through the wall is not a successful installation, regardless of how good the letters look from the street.
Power Route and Electrical Planning
Wire exits should be planned from the complete electrical route backward. Before selecting a point on the letter back, determine where the low-voltage wiring will travel after it exits. It may enter the wall immediately, pass behind a backboard, connect inside a raceway, travel through a fabricated bracket, or run toward an accessible service location inside the building. The power supply may also be located in different places depending on the project and local requirements.
Channel letters commonly use low-voltage LED systems, including 12V and 24V configurations. iduoduo’s engineering records note that 12V systems are often used for standard modules and many small or medium projects, while 24V may be used for certain longer runs, larger installations, or specific LED systems. The LED modules, power supply, controller, conductor size, and circuit layout must remain electrically compatible rather than being selected independently.
Larger signs may also require several electrical groups rather than one long circuit. The number of letters, wattage per letter, power-supply location, conductor length, building provisions, maintenance requirements, and control system can all influence grouping. The most useful wire exit is therefore not simply the easiest place to drill a hole. It is the point that supports a short, organized, serviceable electrical route without creating unnecessary cable length.
Letter Geometry and Internal Clearance
A channel letter is not an empty metal shell. Its back area is already shared by LED modules, internal conductors, mounting studs, seams, structural reinforcement, drainage provisions, connectors, and sometimes removable service components. This is one reason a fixed rule such as “always place the wire exit in the middle” is too simplistic for professional work.
Different letter shapes create very different usable zones. A wide M can provide several possible routes, while a narrow I may have very little space between the LED modules and mounting hardware. Curved letters such as S, C, and O can create different internal cable paths from straight letters such as E, H, or L. Logos with narrow necks, separate elements, or small negative spaces may need individual engineering rather than a repeated standard location.
The practical sequence is to confirm the construction, review the LED arrangement, establish mounting points, understand the external power route, and then choose an exit position that leaves enough internal clearance. The final point should also be checked for waterproofing and service access before it is recorded on the approved drawing. iduoduo treats power, wiring, mounting, wire exits, drainage, and site interfaces as connected parts of channel letter engineering rather than isolated production tasks.
How Should Wire Exits Be Positioned on Channel Letters?
Position each channel letter wire exit where the internal cable can reach it cleanly and the external lead can continue toward the planned power route without interference. Keep the exit clear of studs, fasteners, LED modules, reinforcement, and drainage details. Where concealed wiring is required, the opening should remain within the visual footprint of the installed letter and be clearly identified on the approved drawing and template.
Positioning Each Letter
There is no universal dimension that works for every channel letter. A geometric center can be a reasonable starting point for some simple designs, but the final position should be determined by the actual product and installation conditions. The internal cable needs a natural route to the opening without being sharply bent, trapped below an LED module, compressed against metal hardware, or forced through an area that becomes difficult to seal.
The external side of the exit is equally important. A perfectly placed opening inside the letter has little value if the installer cannot retrieve the conductor from the other side of the wall. The exit should correspond with a usable wall area, an accessible cavity, a planned raceway, or another defined cable route. If the goal is concealed wiring, the installed letter should also cover the cable transition from normal viewing angles.
Every exit should be measurable from a known reference. Useful references include the letter outline, centerline, baseline, top edge, bottom edge, installation pattern, or product identification number. On a long storefront wordmark, ten individually sensible wire positions are not enough unless all ten can be transferred accurately to the actual building.
Separating Wiring from Mounting Hardware
Wire exits and mounting holes should be coordinated on the same drawing because they compete for space both on the letter back and on the wall. Channel letters may use threaded studs, screws, brackets, tabs, rivet nuts, or other project-specific attachment systems. Each mounting point needs room for drilling, anchoring, adjustment, and sealing, while the wire opening needs enough working area for cable feeding and protection.
When these features are placed too close together, installation becomes unnecessarily difficult. Crowded drilling can weaken fragile façade areas, a fastener can pinch a conductor, sealant can become difficult to apply cleanly, and the installer may lose the adjustment tolerance needed to align the letters. There is no single minimum clearance that applies to every anchor, cable, wall material, and sign construction, so the correct spacing needs to be reviewed project by project.
A useful engineering question is whether the installer can drill the mounting hole, install the anchor, feed the cable, seal the penetrations, and still make normal positioning adjustments without one operation obstructing another. iduoduo’s installation drawing system can place studs, mounting holes, wire exits, raceways, backboards, product numbers, templates, and installation sequence information on the same coordinated drawing.
Lead Length and Concealed Routing
The lead wire needs enough usable length to pass through the wall or mounting system and reach its intended connection point without pulling on the internal LED wiring. At the same time, adding excessive wire is not automatically safer. Long loose conductors can create coils behind letters, occupy limited internal space, rub against edges, interfere with mounting, and make troubleshooting more confusing.
Lead length should be evaluated against wall thickness, raceway depth, backboard construction, connection location, access behind the installation surface, and the working space available to the installer. The goal is not to provide the longest possible lead. The goal is to provide enough controlled length for the actual installation method without creating unnecessary excess.
Concealment deserves particular attention on halo-lit letters because the designed gap between the letter and wall can expose wiring when viewed from the side or from below. A cable that is invisible in a straight front elevation may still be obvious to someone approaching the storefront at an angle. For this reason, hidden wiring should be reviewed in relation to realistic viewing positions rather than only in a two-dimensional drawing.
How Do Mounting Methods Change Wire Exits?
Mounting method can completely change the wire-exit strategy. Direct-mounted letters generally require accurate coordination between every individual letter and the wall, while raceways and backboards provide a shared zone for wiring. Stand-off halo installations add visibility considerations because cables may be seen through the gap. The preferred solution depends on the façade, electrical access, appearance, installation labor, maintenance, and local project requirements.
Direct Mounting
Direct mounting places each letter independently on the wall and is often selected because it creates a clean architectural appearance without a visible support enclosure behind the wordmark. That visual simplicity, however, usually increases the importance of accurate installation data because each individual letter must correspond with both the approved graphic layout and the actual conditions behind the façade.
A full-size installation pattern is especially useful for direct-mounted letters. It allows the installer to establish the baseline, letter spacing, mounting points, and cable penetrations before the finished letters are attached. Rear-wall access also becomes important. If the low-voltage wires are expected to disappear directly through the wall, the installer needs a practical way to retrieve, route, identify, and connect them on the opposite side.
For projects manufactured remotely, accurate façade photographs, elevations, wall information, existing power locations, and installer comments can significantly improve the quality of the final wire-exit plan. Direct mounting should not be assumed to require less engineering simply because the finished installation looks visually simple. In many cases, it requires the most precise coordination of all the common mounting methods.
Raceway Mounting
A raceway provides a shared mechanical and electrical zone behind several letters. Individual letter leads can feed into the enclosure, allowing wiring to be organized before the complete assembly interfaces with the building. Depending on the product design and applicable requirements, this arrangement can reduce the number of separate electrical penetrations through the façade and make future access more straightforward.
The letter-to-raceway connection still requires careful planning. Lead wires should be long enough to reach their intended connections without being pulled tight, but they should not be left in uncontrolled loops where they can rub against metal edges or complicate servicing. Cable openings need suitable protection, and circuit identification should remain understandable after all letters have been installed on the raceway.
The main trade-off is appearance. A raceway introduces a visible enclosure behind the letters, although its finish can often be coordinated with the wall. Where façade penetration limits, rear access, or installation speed are more important than a completely independent-letter appearance, a raceway can offer a practical engineering solution.
Backboards and Stand-Off Systems
A backboard creates another shared installation plane behind the letters. It can help organize wiring, establish letter alignment before delivery, and reduce the number of visible transitions between individual letters and a difficult wall surface. This can be particularly useful when the façade is uneven, visually busy, or not suitable for repeated individual penetrations.
The backboard itself still needs to be engineered as a functional component. Its fixing points, building power entry, cable clearance, drainage, edge protection, and serviceability all matter. A backboard should not be treated as a decorative plate added after the electrical and installation design has already been completed.
Stand-off halo letters create a different challenge. The space between the letter and wall is necessary for the halo effect, but that same space can expose cables, fittings, sealant, or brackets from oblique viewing angles. Good wire-exit planning keeps the cable visually hidden while preserving enough stand-off distance for the desired light wash and allowing the installation to remain serviceable.
| Mounting Method | Typical Wire Route | Main Site Issue | Key Planning Priority |
| Direct mount | Individual letters into wall | Multiple precise penetrations | Template accuracy and rear access |
| Raceway mount | Letters into shared enclosure | Raceway-to-building connection | Wiring organization and service access |
| Backboard mount | Wiring behind common panel | Panel fixing and cable entry | Clearance and coordinated routing |
| Stand-off halo mount | Behind raised letters | Cable visibility through wall gap | Concealment from viewing angles |
No mounting method is automatically the best choice. A premium retail façade may prioritize the cleaner appearance of direct mounting, while a site with limited wall access may benefit from a raceway or backboard. The wire-exit design should follow the selected installation architecture rather than forcing every project into the same production standard.
What Should Drawings and Templates Show?
Channel letter drawings and templates should convert the installation plan into measurable, repeatable information. They should clearly identify dimensions, letter positions, mounting points, wire exits, installation method, and product numbering. Complex projects may also require cross-sections, raceway or backboard dimensions, electrical groups, power-supply locations, cable relationships, and installation sequence so the factory and site team work from the same information.
Shop Drawing Details
A professional shop drawing is more than a polished visual of the finished sign. It connects appearance approval to fabrication, quality control, electrical preparation, and installation. When wire exits are involved, the drawing should contain enough information for production staff, project managers, QC inspectors, and installers to identify the same physical point without relying on memory or informal chat messages.
iduoduo’s channel letter engineering records identify front views, overall dimensions, individual letter height, sign width, return depth, cross-sections, face construction, returns, backs, LED systems, power supplies, mounting holes, wire exits, installation method, colors, and quantity as useful shop-drawing information. Complex projects may also include segmentation, raceway details, and electrical grouping.
The drawing becomes especially important when the site team requests a revision. If an installer identifies a structural rail behind the original cable position, moving the exit on the drawing before production is straightforward. If the request stays only in an email while the production drawing remains unchanged, the factory can easily manufacture the earlier version. The approved engineering file should therefore become the controlling reference before fabrication begins.
Installation Templates
The installation template converts the drawing into something that can be transferred physically to the wall. For direct-mounted channel letters in particular, a full-size pattern helps installers establish overall position, baseline, letter spacing, mounting points, and electrical penetrations before drilling the finished façade.
A useful template may show the baseline, centerline, overall sign width, individual letter sequence, mounting holes, cable openings, alignment marks, and outlines for a raceway or backboard where applicable. Large signs may require a template to be divided into multiple pieces, so matching marks and section numbers become important. Two individually accurate template sections can still produce the wrong overall spacing if the installer has no reliable method of aligning them.
The template should nevertheless remain an installation aid rather than a substitute for field verification. A factory can reproduce approved coordinates very accurately, but it cannot detect an unreported structural member or a façade change made after sign approval. iduoduo’s engineering documentation specifically notes that installation drawings are created using the information known to the factory and that the actual site still needs to be checked before final installation.
Electrical Identification and Revision Control
Electrical information becomes more important as channel letter systems grow larger. A small interior logo may use a straightforward circuit, while a long exterior storefront can require several power supplies, multiple low-voltage branches, controllers, longer cable runs, and separate letter groups. When these systems become more complex, wire exits should be shown in a way that helps installers understand which conductor belongs to which part of the sign.
Useful electrical drawing information can include power-supply quantity, circuit groups, LED circuits, controllers, dimmers, wire exits, low-voltage outputs, input voltage, power-supply locations, and connection relationships. These drawings support coordination between manufacturing and installation, but they do not replace the final site electrical work or local professional responsibilities where those are required.
Revision control is equally important. A project may change because the façade size is revised, the sign moves, the mounting system changes, a backboard is added, the electrician relocates the power point, or the installer requests a different cable exit. Once production begins, everyone should know which approved revision controls the letter backs, holes, electrical arrangement, and installation pattern.
How Do You Avoid Wire Exit Installation Problems?
Most wire-exit problems can be prevented before fabrication by coordinating the letter construction with the actual wall, mounting pattern, electrical route, waterproofing strategy, and maintenance plan. Problems commonly appear when site information is incomplete, drawing revisions are not controlled, cables are forced into unnecessarily long routes, or penetrations are placed where they cannot be sealed, accessed, or drilled safely.
Structural Conflicts and Version Mismatch
Many installation problems begin as missing information rather than poor workmanship. A manufacturer may receive a logo and an overall width but no reliable information about the wall cavity, electrical point, or structural framing. The factory then creates a workable product based on the available data, while the installer later discovers that the building conditions require a different solution.
Another common problem is version mismatch. A project may begin with individual direct-mounted letters, then change to a backboard after an architectural review. The electrician may later relocate the power point, and the installer may request a different wire-exit area. If those decisions are spread across several emails and drawings, production can easily receive a technically outdated file.
Before production release, compare the final sign layout, wall information, mounting method, mounting holes, wire exits, electrical entry, circuit groups, and any raceway or backboard dimensions. If these details appear on several documents, they should agree. Changing a line or coordinate during drawing approval is inexpensive; correcting a finished, painted, wired letter on a lift is not.
Voltage Drop and Wiring Quality
Wire-exit location also affects electrical performance because it becomes part of the conductor route. Low-voltage LED systems are sensitive to conductor length, wire size, current, system voltage, connector quality, and the way the load is divided between circuits. Excessively long or undersized runs can contribute to voltage drop, which may appear as reduced brightness, unstable operation, or inconsistent illumination across a sign.
There is no responsible universal rule stating that every 12V or 24V installation can use the same maximum wire length. The allowable route depends on the actual load, conductor size, LED modules, power supply, circuit configuration, and product requirements. Engineering should therefore consider system voltage, wattage, cable length, wire gauge, number of branches, connector quality, and power-supply position together.
iduoduo’s channel letter records specifically identify line length, wire size, circuit grouping, power-supply location, and voltage drop as factors that need to be controlled in larger illuminated letter systems. A wire exit does not solve voltage drop on its own, but a poorly positioned exit can create an unnecessarily long and difficult route.
Waterproofing and Serviceability
Outdoor cable penetrations should always be treated as potential water paths. The wire hole is part of the same weather-management problem as stud holes, raceway fixings, backboard holes, brackets, curtain-wall penetrations, and the building waterproof layer. Sealants and protective details need to be compatible with the cable, metal, façade material, exposure conditions, and installation method.
Using more sealant does not automatically create a better result. Poorly planned sealing can trap moisture, interfere with drainage, cover serviceable parts, or make future removal unnecessarily destructive. The goal is to control water entry while allowing the sign and building interface to behave as intended.
Maintenance should also influence wire-exit design. A system may eventually require power-supply replacement, LED repair, connector inspection, cable troubleshooting, controller service, face removal, or seal inspection. A beautiful installation that requires destructive wall work to access routine electrical components is difficult to maintain. Good engineering considers how the sign will be serviced years after the opening-day photographs have been taken.
What Should Be Confirmed Before Production?
Before production begins, confirm the final letter layout, wall condition, mounting system, mounting points, wire exits, power route, LED system voltage, power-supply location, circuit grouping, waterproofing needs, and installation documentation. Any information that changes the physical back of the letter or its connection to the building should be resolved before cutting, drilling, finishing, wiring, assembly, testing, and packing.
Site Data Package
The factory does not need a complete architectural model for every channel letter project, but it needs enough accurate information to understand how the finished product will connect to the building. A simple indoor reception logo may require relatively little site engineering, while a large exterior sign on stone, metal cladding, insulated panels, or a curtain wall can require far more detailed coordination.
A useful site package can include:
- Vector artwork or approved logo file
- Overall sign dimensions
- Individual letter height where relevant
- Wall elevation
- Installation height
- Wall or façade material
- Indoor or outdoor use
- Site photographs
- Mounting method
- Available rear access
- Existing electrical point
- Input voltage
- Planned power-supply location
- Raceway or backboard requirement
- Known structural restrictions
- Waterproofing concerns
- Destination market
- Required installation date
The installation country also matters because electrical configuration should be based on the actual site rather than the office location of the purchasing company. iduoduo’s engineering records include 110V and 220–240V among common project input ranges while emphasizing that the real site voltage still needs to be confirmed.
| Item to Confirm | Common Project Information | Effect on Wire-Exit Planning |
| LED system | 12V or 24V where applicable | Influences circuit and cable routing |
| Site input | Often 110V or 220–240V, project dependent | Determines power-supply configuration |
| Mounting method | Direct, raceway, backboard or stand-off | Changes the physical wiring path |
| Wall construction | Masonry, drywall, cladding, stone, etc. | Determines usable penetration areas |
| Power location | Building interior, raceway or accessible service zone | Establishes cable direction |
| Rear access | Open, limited or unavailable | Changes connection method |
| Wire exits | Approved coordinates | Controls drilling and template data |
| Installation template | Final project layout | Transfers factory information to site |
Installer and Manufacturer Approval
The manufacturer understands the fabricated letter, while the local installer understands the building. The strongest installation plan combines those two types of knowledge before the product enters production. The factory can identify an exit location that works with LED modules, mounting hardware, letter construction, wiring, and fabrication. The installer can confirm whether that location works with framing, stone joints, façade systems, electrical access, anchors, and actual field conditions.
A practical approval path is design confirmation, engineering review, site review, installer review, final drawing approval, and then production release. The installer does not necessarily need to approve every cosmetic manufacturing detail, but the installation interface should be clear enough that mounting holes, wire exits, raceways, backboards, wall conditions, cable routing, electrical access, and service space do not remain unresolved.
This is particularly valuable on projects involving several parties, such as a brand team, architect, design agency, sign company, contractor, electrician, local installer, and manufacturer. Without one controlled technical version, every participant can make a reasonable decision individually while the final project still becomes inconsistent.
Production Freeze and QC
Once the installation interface has been approved, the relevant information should be frozen into the final production file. Dimensions, letter depth, face construction, return material, back construction, LED specification, power configuration, circuit grouping, mounting points, wire exits, raceway or backboard details, colors, product numbers, installation template data, and packing identification should all reflect the same approved project version.
At quality-control stage, the wire exit should not be checked simply by confirming that a hole exists. Its location should be compared against the approved drawing, just as mounting holes and dimensions are checked. This becomes especially important on multi-letter sets because one incorrect letter can disrupt an otherwise accurate installation sequence.
For repeat projects, retaining final drawings, materials, colors, LED information, power supplies, mounting holes, wire exits, templates, packaging records, and QC information can reduce the amount of technical work that needs to be reconstructed later. iduoduo’s documented channel letter support can also include installation templates, hole-position drawings, wire-exit drawings, raceway drawings, electrical grouping information, product numbering, accessory lists, and remote installation coordination.
Correct wire-exit positioning is ultimately less about finding one perfect point on the back of every letter and more about making the product, wall, power route, mounting system, template, waterproofing, and maintenance plan agree before shipment. When these details are coordinated early, installers receive a product that behaves as expected on site. When they are not, a small hole only a few centimeters from the intended position can turn into unnecessary drilling, exposed wiring, delays, and expensive field modification.
For commercial channel letter projects, the most reliable approach is to treat wire exits as part of the engineering approval rather than a production-floor decision made after everything else has been fixed. When wall information, power access, installation method, and local installer requirements are available early, iduoduo can incorporate these details into the manufacturing and installation interface before production, helping reduce avoidable work after the signs arrive.
Frequently Asked Questions
Where should the wire exit be on a channel letter?
The wire exit should be located on the back of the letter where internal wiring can reach it without crossing critical LED modules, studs, reinforcement, or other hardware, while the external lead can continue toward the planned power route. Whenever concealed wiring is required, the exit should normally remain behind the visual footprint of the installed letter. The final position should be shown on the approved shop drawing and coordinated with the installation template.
Should every channel letter have its own wire exit?
Individual direct-mounted illuminated letters commonly require their own low-voltage wire route, but the exact arrangement depends on how the sign is constructed and mounted. Raceway and backboard systems can collect wiring from several letters within a shared structure before the electrical system interfaces with the building. Large or complex signs may also be divided into several electrical groups, so wire exits should follow the approved electrical and mounting design rather than a fixed rule.
How do you hide wires on channel letters?
Wires are usually hidden by positioning the exit behind the letter and routing the conductor through the wall, behind a backboard, or into a raceway. The preferred method depends on the building and mounting system. Halo-lit letters require extra attention because the stand-off gap can expose cables from side angles. A concealed route should still remain serviceable enough for troubleshooting and maintenance rather than being permanently inaccessible.
Do channel letter wire exits need to appear on the installation template?
For direct-mounted letters, including wire or power-hole positions on a full-size installation template can make field installation much more predictable because the installer can transfer the approved locations to the wall before mounting the letters. The template should correspond with the final engineering drawing, but the installer should still confirm site conditions before drilling because framing, façade components, utilities, or construction changes may not be visible in the original factory information.
Does wire-exit position affect LED voltage drop?
The exit itself does not create voltage drop, but it can influence the total conductor route. Longer low-voltage runs increase electrical resistance, so cable length, conductor size, load, system voltage, power-supply location, connector quality, and circuit grouping should be evaluated together. Large channel letter sets may require multiple circuits or strategically positioned power supplies to avoid unnecessarily long runs and maintain consistent electrical performance.
Is a raceway better than direct mounting for wiring?
A raceway can simplify wiring because several letters can feed into one shared enclosure, which may reduce the number of separate building penetrations and improve access to the electrical system. Direct mounting often produces a cleaner architectural appearance but normally requires more precise coordination of individual mounting points and wire exits. Neither method is automatically better; the right choice depends on façade conditions, appearance, access, maintenance, installation labor, and project requirements.
What information should a manufacturer receive before finalizing wire exits?
The manufacturer should ideally receive the approved letter layout, dimensions, wall type, site photographs, mounting method, power location, input voltage, rear-wall access information, raceway or backboard requirements, and any known structural restrictions. For difficult façades or large commercial projects, installer comments and wall sections can be especially useful. The more accurate the site information is before production, the easier it becomes to reduce avoidable installation conflicts.
