Builders Works Openings (BWO) & SEM Penetration Drawings
Eliminate expensive core-drilling penalties and structural clashes. Coordinated cast-in deck sleeves, core penetrations, and firestop clearance schedules before the pour.
Technical Deliverables & Scope
Pre-Pour Slab Sleeve Layouts
Dimensioned penetration drawings with Trimble RTS / total station coordinate points for fast-track site layout.
Wall & Core Opening Schedules
Exact opening clearances calculated for duct flanges, pipe insulation, acoustic lagging, and structural buffers.
SEM Structural Sign-Off Sheets
Combined Services & Structural aperture drawings prepared for structural consultant and engineer sign-off.
Tested Firestop Collar Coordination
Ensuring code-compliant annular clearances for Hilti, Rockwool, and tested passive fire protection systems.
Frequently Asked Technical Questions
How do you determine sleeve sizing and wall opening dimensions? +
We calculate required aperture dimensions based on outside pipe/duct diameters plus thermal insulation thickness, acoustic lagging, and manufacturer-tested firestop annular space requirements.
Can you provide coordinate points for robotic layout stations? +
Yes. We export precise CSV/DXF point coordinate lists formatted for Trimble RTS, Leica iCON, or Hilti total stations for one-person pre-pour deck layout.
How fast can you deliver penetration drawings for an upcoming concrete pour? +
We recognize that pour dates are rigid. We provide prioritized 48-hour turnarounds for critical slab and deck sleeve packages to prevent project delays.
Need Coordinated Drawings in Your Region?
Send us your architectural backgrounds, single-line schematics, or equipment schedules for an immediate review and fixed-fee estimate.