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MAN-02 · Al-Manjam
Al-Manjam village — tower
Tower · 3 storeys · 190 m² N elevation built c. 1780estimated criticality 4/5
Latest capture
26 Aug 2026 · 70 d ago
Measured on this visit
1.5 mm
max crack width
4%
surface loss
7%
salt loading
Stable
marker MK-MAN-02 · confidence 92% · Y. Al-Amri
Risk
0–100
21Stable
stableintervene
Time to 5 mm71 months
Growth rate0.05 mm / month
Intervention estimateSAR 33,500
Findings
5 captures
Salt crystallisation
dominant mechanism on the last visit
Rising damp line at 35% RH
salt crystallisation risk band
N face exposed to prevailing wind
drives the wet–dry cycle above 44 °C
Crack width over time
mm · measured, then forecast
Dots are accepted captures. The dashed tail is a linear projection of the measured rate — it is what moves this structure up the intervention queue, not the current width alone.
Defects on the latest visit
26 Aug 2026
| Defect | Width | Length | Face | Mechanism | Drives risk |
|---|---|---|---|---|---|
| Defect 1 | 1.5 mm | 899 mm | W | Salt crystallisation | worst |
| Defect 2 | 0.7 mm | 302 mm | SE | Structural crack | — |
| Defect 3 | 0.6 mm | 1,286 mm | SE | Structural crack | — |
The wall carries 3 separate defects at this visit. The widest one sets the risk band; the others are counted and carried in the record.
Capture ledger
5 accepted
| Date | Crack | Loss | Salt | RH | Mechanism | Captured by | Marker | Confidence |
|---|---|---|---|---|---|---|---|---|
| 26 Aug 2026 | 1.5 mm · +2 | 4% | 7% | 35% | Salt crystallisation | Y. Al-Amri | MK-MAN-02 | 92% |
| 19 Apr 2026 | 1.3 mm · +2 | 3% | 6% | 29% | Water ingress | Y. Al-Amri | MK-MAN-02 | 87% |
| 10 Dec 2025 | 1.0 mm · +2 | 4% | 9% | 63% | Structural crack | Field survey | MK-MAN-02 | 91% |
| 03 Aug 2025 | 0.8 mm · +2 | 3% | 7% | 57% | Surface loss | Y. Al-Amri | MK-MAN-02 | 94% |
| 26 Mar 2025 | 0.7 mm · +2 | 3% | 5% | 43% | Salt crystallisation | Field survey | MK-MAN-02 | 98% |
Field note
Defensive tower on the village edge. Guardian: Y. Al-Amri.
Site reference: Saudi Press Agency — Al Manjam village report.