Public-sector construction projects such as schools, hospitals, courthouses, and transit facilities come with a unique set of challenges and expectations. One of the most critical requirements for electrical contractors bidding on these projects is compliance with CSI Division 26.
CSI (Construction Specifications Institute) developed a standardized format known as MasterFormat, which organizes construction information into divisions. Division 26 specifically covers electrical systems, including power distribution, lighting, wiring devices, and specialty systems. For public bids, formatting your electrical takeoff according to CSI Division 26 is not just recommended it’s often mandatory.
This guide explores how to structure your electrical takeoff using CSI Division 26, why it matters for public projects, and how it can help you win more bids, avoid scope gaps, and streamline project execution.
Table: CSI Division 26 Sections for Electrical Takeoff
| CSI Section | Description | What to Include in Takeoff |
| 26 05 00 | Common Work Results for Electrical | General scope, coordination notes, basic materials |
| 26 05 19 | Low-Voltage Electrical Power Conductors | Wire types, sizes, insulation, voltage ratings |
| 26 05 33 | Raceways and Boxes | Conduit types, fittings, boxes, supports |
| 26 24 16 | Panelboards | Panel types, breakers, mounting, labeling |
| 26 27 26 | Wiring Devices | Switches, receptacles, dimmers, cover plates |
| 26 51 00 | Interior Lighting | Fixture types, mounting, controls, emergency lighting |
| 26 09 23 | Lighting Control Devices | Occupancy sensors, timers, dimming systems |
| 26 41 00 | Facility Lightning Protection | Grounding rods, conductors, surge protection |
| 26 50 00 | Lighting | General lighting systems and specifications |
Sources: S.F. Johnson Consulting CSI Division 26 Guide, University of Northern Iowa Electrical Specs
Why CSI Division 26 Matters in Public Projects
1. Standardization Across Trades
CSI formatting ensures consistency across all disciplines electrical, mechanical, architectural, and structural. This makes coordination easier and reduces confusion during bidding and construction.
2. Bid Compliance
Public agencies often require CSI-formatted estimates. Bids that don’t follow this structure may be disqualified or returned for revision.
3. Scope Clarity
Breaking out electrical components by CSI section helps general contractors, architects, and owners verify quantities, pricing, and scope coverage.
4. Streamlined Procurement
Material lists tied to CSI sections make it easier for purchasing teams to order and track items. This reduces delays and improves supply chain efficiency.
5. Improved Documentation
CSI formatting supports change order tracking, submittals, and closeout documentation all critical in public work where transparency and accountability are key.
How to Format Your Electrical Takeoff Using CSI Division 26
| Step | Action |
| Review Project Specs | Identify which CSI sections are required for the bid |
| Organize Takeoff by Section | Group quantities under each CSI heading |
| Use Consistent Codes | Match drawing symbols and schedule references to CSI categories |
| Include Labor Units | Apply NECA or historical labor rates per CSI section |
| Document Assumptions | Note exclusions, alternates, and clarifications per section |
| Format Estimate for Submission | Use spreadsheet or estimating software with CSI headers |
Real-World Example: Public School Bid in Texas
An electrical contractor bidding on a new middle school:
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- Used CSI Division 26 to format the entire electrical takeoff
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- Broke out lighting fixtures under 26 51 00 and controls under 26 09 23
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- Included conduit and wire under 26 05 33 and 26 05 19
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- Submitted a CSI-formatted spreadsheet with quantities, labor, and material pricing
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- Coordinated with Division 27 (communications) and Division 28 (security) for low-voltage systems
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- Won the bid with zero scope gaps and full compliance with district requirements
CSI Division 26 Takeoff Checklist
Before submitting your electrical estimate for a public project, make sure you:
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- Review project specs for required CSI sections
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- Use symbol legend to match devices to CSI categories
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- Break out wire, conduit, panels, and fixtures by section
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- Include labor units and installation notes per section
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- Format estimate using CSI headers and numbering
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- Document assumptions and exclusions clearly
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- Coordinate with Division 27 (communications) and Division 28 (security) if applicable
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- Submit estimate in spreadsheet or estimating software format
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- Include testing, commissioning, and permit costs
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- Track revisions and addenda during preconstruction
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- Validate quantities with architectural and mechanical drawings
Business Benefits of CSI-Compliant Electrical Takeoff
| Benefit | Impact on Your Business |
| Higher Bid Acceptance Rate | CSI formatting meets agency requirements and avoids disqualification |
| Fewer Change Orders | Clear scope and documentation reduce disputes |
| Protected Profit Margins | Accurate labor and material pricing prevents overruns |
| Improved Client Trust | Professional estimates build credibility with architects and owners |
| Better Forecasting | Historical data improves future bids and productivity planning |
| Stronger Reputation | Positions you as a detail-oriented and reliable contractor |
Final Thoughts
Electrical takeoff for public projects isn’t just about counting parts it’s about presenting your scope in a format that meets industry standards and agency expectations. CSI Division 26 provides the structure you need to deliver clear, compliant, and competitive estimates.
At MSB Estimating, we help electrical contractors produce CSI-formatted takeoffs that win public bids and streamline project delivery. Whether you’re bidding on a school, courthouse, or transit facility, we’ve got your estimating needs covered.
Need Help With CSI Division 26 Takeoff?
Contact MSB Estimating today to streamline your public project bids with expert electrical takeoff services.