Ip3 Control De Obras [upd] -

Guide: IP3 – Control de Obras (Construction Inspection & Quality Control) 1. Objective Define the systematic inspection and control activities to verify that construction works comply with approved plans, technical specifications, applicable codes, and contract requirements. IP3 focuses on execution control during the construction phase. 2. Scope Applies to all construction activities: earthworks, foundations, structures, pavements, finishes, installations, and safety measures. Covers materials, processes, dimensions, tolerances, and workmanship. 3. Key Responsibilities | Role | Responsibility | |------|----------------| | Resident Engineer | Approve IP3 plan; take corrective actions. | | Quality Inspector | Perform daily inspections; complete IP3 checklists; report non-conformities. | | Contractor’s Supervisor | Provide access, resources, and rectify defects. | | Laboratory Technician | Conduct material sampling and testing. | 4. IP3 Workflow – Step by Step Step 1: Pre-activity Verification Before any activity begins, verify:

Approved shop drawings & method statements. Calibrated equipment & measuring tools. Material certificates & test reports. Personnel qualifications & safety measures.

Step 2: During-activity Inspection (Hold Points) Mandatory inspection at critical stages. Common hold points : | Activity | Hold Point | Acceptance Criteria | |----------|------------|----------------------| | Earthworks | Compaction | ≥95% Proctor density; moisture within ±2% | | Concrete pour | Formwork & rebar | Rebar spacing ±10 mm; cover as per drawing | | Asphalt laydown | Temperature | 140–160°C before compaction | | Welding | Visual & NDT | No cracks; penetration per AWS D1.1 | | Waterproofing | Substrate dryness | Humidity ≤5% (capacitance meter) | Step 3: Sampling & Testing Plan (per IP3) Establish frequency (example for roads): | Material | Test | Frequency | |----------|------|------------| | Concrete | Slump, compressive strength | 1 per 50 m³ per day | | Soil | Proctor, CBR | 1 per 500 m³ or layer change | | Rebar | Tensile, bend | 1 per 20 tons per diameter | | Asphalt | Marshall stability, density | 1 per 200 tons | Step 4: Documentation – IP3 Checklist Fields Each inspection record must include:

Project name & location. Activity description & drawing reference. Date, weather conditions. Measured values vs. required tolerances. Pass/Fail decision. Signatures: Inspector + Contractor rep. Photos (geotagged preferred). ip3 control de obras

Step 5: Non-Conformity Management (NCR) If a check fails:

Issue Non-Conformance Report (NCR) within 24h. Classify severity: Minor / Major / Critical. Propose corrective action (repair, redo, replace). Re-inspect after correction. Close NCR with evidence.

5. IP3 Control Tools & Templates Recommended instruments Guide: IP3 – Control de Obras (Construction Inspection

Laser distance meter, level, theodolite. Concrete test hammer (Schmidt), cover meter. Nuclear density gauge (for compaction). Infrared thermometer (for asphalt).

Digital templates (Excel/Tablet)

Daily IP3 Log – tracks all inspections per zone. Hold Point Release Form – authorizes next activity. Material Receiving Inspection – checks delivery against PO. 5. IP3 Control Tools &amp

6. Frequency Matrix (Example) | Element | Inspection Frequency | Who | |---------|----------------------|-----| | Setting out | At start, then weekly | Surveyor | | Rebar placement | 100% before concrete | Inspector | | Concrete curing | Daily for 7 days | Inspector | | Welds | 10% visual + 5% NDT | NDT Level II | | Final finish | 100% upon completion | Engineer | 7. Common Deficiencies & Preventive Actions | Deficiency | Root Cause | IP3 Preventive Action | |------------|------------|------------------------| | Poor compaction | Insufficient passes | Check roller pattern; use GPS tracking | | Rebar misalignment | No templates | Require spacer bars & rebar chairs | | Honeycombing in concrete | Over-vibration or segregation | Verify vibrator insertion depth & duration | | Asphalt segregation | Temperature drop | Monitor transport time & cover trucks | 8. Integration with Other IPs

IP1 – Material receiving & storage. IP2 – Calibration of equipment. IP3 – Execution control (this guide). IP4 – Final acceptance & handover.