Building Deformation Monitoring Malaysia How to Monitor Structural Movement with Total Station & Prisms
Published: 28 August 2026
# **Building Deformation Monitoring Malaysia How to Monitor Structural Movement with Total Station & Prisms**
## **QUICK ANSWER**
**Building Deformation Monitoring** is the repeated measurement of selected points on a building to determine whether measurable movement is occurring over time.
A common surveying-based solution uses:
**Total Station + Monitoring Prism + Stable Reference Points**
The basic monitoring process is:
**Establish Reference Points**
↓
**Install Monitoring Prisms**
↓
**Take Baseline Measurements**
↓
**Repeat Measurements**
↓
**Compare Coordinates**
↓
**Identify Movement or Trend**
MTM Precision supplies **Total Stations, Monitoring Prisms, Mini Prisms, Survey Monitoring Accessories and Structural Monitoring Equipment in Malaysia** for surveyors, engineers, consultants, contractors and infrastructure projects.
## **WHAT IS BUILDING DEFORMATION?**
Building deformation refers to changes in the position, shape or geometry of a structure.
Depending on the project, engineers and surveyors may need to investigate:
**Horizontal displacement**
**Vertical displacement**
**Settlement**
**Differential settlement**
**Structural movement**
**Wall movement**
**Column movement**
**Changes in selected monitoring points**
**Crack development**
The important factor in monitoring is usually not one isolated measurement.
It is:
**Change Over Time.**
## **WHY MONITOR BUILDING DEFORMATION?**
Building movement can potentially be associated with many different conditions, including:
Nearby excavation
Basement construction
Foundation works
Tunnelling
Adjacent construction
Ground settlement
Slope movement
Structural alteration
Heavy construction activity
Ageing
Unusual ground movement
Seismic activity
Monitoring provides quantitative measurements that can support professional engineering evaluation.
## **WHAT EQUIPMENT IS USED FOR BUILDING DEFORMATION MONITORING?**
**Measurement Required:**
Horizontal / 3D structural movement
**Equipment:**
**Total Station + Monitoring Prism**
**Measurement Required:**
Settlement / elevation change
**Equipment:**
**Auto Level + Levelling Staff / Total Station**
**Measurement Required:**
Crack width change
**Equipment:**
**Crack Width Meter / Crack Monitor**
**Measurement Required:**
Permanent structural survey point
**Equipment:**
**Monitoring Prism / Mini Prism / Survey Target**
**Measurement Required:**
Concrete condition
**Equipment:**
**Appropriate Concrete & Structural NDT Equipment**
## **1. TOTAL STATION FOR BUILDING DEFORMATION MONITORING**
A **Total Station** measures angles and distances to survey targets.
For deformation monitoring, selected targets are installed or established at points of interest on the building.
An initial survey establishes the baseline.
The same monitoring points are then measured again at predetermined intervals.
For example:
**Baseline**
↓
**Week 1**
↓
**Week 2**
↓
**Month 1**
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**Month 3**
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**Compare Results**
If coordinates change beyond the expected measurement uncertainty, the data can be reviewed as part of the monitoring programme.
The required monitoring accuracy, observation procedure and interpretation should be determined according to the project requirements.
## **2. MONITORING PRISM FOR BUILDING DEFORMATION**
The **Monitoring Prism** is one of the most important components of a Total Station deformation monitoring setup.
Its job is simple:
**Provide a stable, identifiable and repeatable survey target.**
Monitoring prisms may be installed on:
Building faades
Structural columns
Retaining structures
Concrete walls
Bridge structures
Tunnel structures
Dams
Adjacent buildings
Other infrastructure assets
MTM Precision supplies **professional Monitoring Prism solutions** for structural and deformation monitoring applications in Malaysia.
## **3. WHY PERMANENT MONITORING POINTS MATTER**
Imagine measuring a building today and returning one month later.
If the target itself is placed in a slightly different position, the measurement may include target-positioning differences rather than actual structural movement.
A permanent monitoring point reduces this problem.
This is why deformation monitoring often uses:
**Permanent Monitoring Prism**
or
**Permanent Survey Target**
rather than repeatedly positioning a normal prism pole at approximately the same location.
## **4. MINI PRISM FOR BUILDING MONITORING**
A conventional large survey prism is not always practical for permanent building installation.
A **Mini Prism** or compact monitoring prism can provide advantages where:
Installation space is limited
Multiple points are required
A smaller target is preferred
The target needs to remain installed
Building faades need to be monitored
Retaining structures require multiple monitoring points
This makes compact monitoring prisms particularly relevant to structural monitoring projects.
## **5. REFERENCE POINTS ARE JUST AS IMPORTANT**
Installing monitoring prisms on a building is only part of the system.
The measurement also needs suitable reference or control points.
Conceptually:
**Stable Reference**
↓
**Total Station**
↓
**Monitoring Prism**
↓
**Measured Position**
If the assumed reference itself moves, interpretation of the monitoring results can become unreliable.
Reference stability therefore needs to be considered as part of the monitoring design.
## **6. BUILDING SETTLEMENT MONITORING**
Not all deformation is horizontal.
A building may also require monitoring for changes in elevation.
Depending on the project requirements, settlement monitoring may use:
**Auto Level**
**Levelling Staff**
**Total Station**
**Benchmark**
**Settlement Monitoring Point**
**Permanent Reference Point**
The principle is:
**Establish Baseline Elevation**
↓
**Repeat Levelling**
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**Compare Elevations**
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**Determine Change**
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**Establish Trend**
## **7. DIFFERENTIAL SETTLEMENT MONITORING**
Sometimes the concern is not simply whether an entire building has moved vertically.
The question may be whether:
**one part of the structure has moved differently from another part.**
Monitoring multiple points can help compare relative changes between selected locations.
For example:
**Point A**
**Point B**
**Point C**
**Point D**
Repeated elevation measurements can show whether the measured changes are similar or different across those points.
Interpretation should be performed according to the engineering requirements of the project.
## **8. BUILDING CRACK + DEFORMATION MONITORING**
Visible cracking may lead to another question:
**“Is the crack changing because the structure is moving?”**
A crack instrument alone cannot answer the entire question.
Different measurements can be combined:
**Crack Width Meter**
→ Is the crack width changing?
**Auto Level**
→ Is there measurable settlement?
**Total Station + Monitoring Prism**
→ Are selected structural points moving?
**Concrete NDT**
→ Is further investigation of a concrete element required?
This provides a much stronger measurement strategy than relying on one instrument for every question.
## **9. MONITORING BUILDINGS NEAR EXCAVATION WORKS**
Existing buildings adjacent to excavation and construction works are an important application for deformation monitoring.
Monitoring may be considered around:
Deep excavation
Basement construction
Foundation works
Piling works
Tunnelling
Major infrastructure construction
Adjacent redevelopment
Depending on the monitoring plan, selected points can be measured before and during the works.
This creates a baseline against which later measurements can be compared.
## **10. BUILDING MONITORING AFTER GROUND MOVEMENT OR EARTHQUAKE**
Following felt ground movement, several different questions may arise.
**Did seismic ground motion occur?**
→ **Seismic Monitoring Instrument**
**Did the building move?**
→ **Toal Station + Monitoring Prism**
**Did the building settle?**
→ **Levelling / Total Station**
**Did an existing crack change?**
→ **Crack Monitoring Equipment**
**Does a concrete element require investigation?**
→ **Appropriate Structural NDT**
These are separate measurement problems.
A normal machinery vibration meter should not be substituted for a seismograph or a structural deformation monitoring system.
## **HOW OFTEN SHOULD BUILDING MOVEMENT BE MEASURED?**
There is no universal monitoring interval.
Depending on the project, measurements might be required:
Before construction
During critical construction stages
Daily
Weekly
Monthly
After a triggering event
Over a longer monitoring period
Monitoring frequency should follow the project requirements and responsible professional's monitoring plan.
## **HOW TO CHOOSE BUILDING DEFORMATION MONITORING EQUIPMENT**
### **1. WHAT MOVEMENT ARE YOU MEASURING?**
**Horizontal displacement?**
Consider Total Station monitoring.
**Vertical settlement?**
Consider levelling or suitable Total Station methods.
**Crack movement?**
Consider crack monitoring equipment.
### **2. WHAT ACCURACY IS REQUIRED?**
Monitoring equipment should be selected according to the required project accuracy.
### **3. WHAT IS THE MONITORING DISTANCE?**
This affects Total Station and prism selection.
### **4. WHERE WILL THE PRISM BE INSTALLED?**
Consider the structure, mounting surface, visibility and observation geometry.
### **5. HOW LONG WILL MONITORING CONTINUE?**
Long-term projects may benefit from permanent monitoring targets.
## **TYPICAL APPLICATIONS IN MALAYSIA**
Building deformation monitoring solutions may be used for:
**High-Rise Buildings**
**Residential Buildings**
**Commercial Buildings**
**Factories**
**Buildings Near Excavation**
**Retaining Walls**
**Bridges**
**Tunnels**
**Rail Infrastructure**
**MRT / LRT Projects**
**Dams**
**Slopes**
**Construction Sites**
**Infrastructure Projects**
## **FAQ**
### **1. HOW DO YOU MONITOR BUILDING DEFORMATION?**
One method is to establish monitoring
28 Aug 2026
