Use this video to explain underground utility estimating, pipe sizing, and layout reading.

• Storm drain and sewer systems must meet slope requirements — verify invert elevations and manhole locations.
• Utility drawings often show plan and profile views — master reading both.
• Estimate pipe by linear foot and fittings by quantity — don’t forget valves, tees, and transitions.
• Check for bedding details, compaction notes, and separation distances between utilities.
• Some projects may require shoring, trench boxes, or dewatering — check specs and notes.

1. What do you need to verify in a storm drain system specification?
   Answer: Invert elevations, manhole locations, and slope requirements for proper drainage flow.
2. What’s the importance of plan and profile views in utility drawings?
   Answer: Plan views show the pipe routing, while profile views provide elevation and depth details — both essential for accurate installation.
3. How do you estimate pipe and fittings?
   Answer: Estimate pipe by linear foot and fittings (such as valves, tees, and transitions) by quantity.
4. What should you look for when checking bedding and separation requirements?
   Answer: Ensure the bedding material, compaction, and distances between utilities are correctly specified to prevent conflicts.
5. Why is dewatering important in Division 33?
   Answer: Dewatering helps maintain safe excavation and ensures that water doesn’t compromise utility installation or soil stability.

Division 33: Utilities

🔹 Key Teaching Points

1️⃣ Storm Drain & Sewer Systems

• Verify invert elevations and manhole locations to ensure compliance with slope requirements.
• Confirm drainage system design, including pipe materials, sizes, and slopes as required in the spec.

2️⃣ Plan & Profile Drawings

• Utility drawings will often have both plan and profile views — it’s essential to understand both for accurate estimating.
• Review pipe routing in the plan view and elevation in the profile view for a complete understanding.

3️⃣ Estimating Pipe & Fittings

• Estimate pipe by linear foot and fittings (valves, tees, transitions, etc.) by quantity.
• Don’t forget to account for any special materials or construction techniques for utilities in specific soil conditions.

4️⃣ Bedding & Separation Requirements

• Check specs for bedding material requirements, compaction specifications, and separation distances between utilities.
• Ensure that utilities are separated to avoid conflicts with other trades or systems, such as electrical or mechanical services.

5️⃣ Shoring, Trenching & Dewatering

• Some projects may require shoring, trench boxes, or dewatering for excavation — ensure these are accounted for in the estimate.
• Check for specific trench shielding or dewatering notes to ensure worker safety and compliance with regulations.

✅ Wrap-Up Summary

• Division 33 covers all aspects of utility installation, from storm drains to sewage systems — make sure all details are captured in the estimate.
• Accuracy in estimating pipe, fittings, and shoring is essential to avoid costly delays during construction.
• Be prepared for any environmental or site-specific challenges that may affect utility installation or safety measures.