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QAB-03 · Al-Qabil
Al-Qabil — well house
Storehouse · 1 storeys · 247 m² NE elevation built c. 1800estimated criticality 2/5
Latest capture
22 Jul 2026 · 105 d ago
Measured on this visit
2.0 mm
max crack width
5%
surface loss
11%
salt loading
Stable
marker MK-QAB-03 · confidence 94% · H. Al-Sharif
Risk
0–100
26Stable
stableintervene
Time to 5 mm46 months
Growth rate0.06 mm / month
Intervention estimateSAR 31,000
Findings
5 captures
Salt crystallisation
dominant mechanism on the last visit
Rising damp line at 66% RH
salt crystallisation risk band
NE 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
22 Jul 2026
| Defect | Width | Length | Face | Mechanism | Drives risk |
|---|---|---|---|---|---|
| Defect 1 | 2.0 mm | 1,774 mm | W | Salt crystallisation | worst |
| Defect 2 | 1.2 mm | 1,638 mm | SW | Structural crack | — |
| Defect 3 | 0.9 mm | 1,371 mm | S | 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 |
|---|---|---|---|---|---|---|---|---|
| 22 Jul 2026 | 2.0 mm · +2 | 5% | 11% | 66% | Salt crystallisation | H. Al-Sharif | MK-QAB-03 | 94% |
| 25 Jan 2026 | 1.6 mm · +2 | 3% | 12% | 42% | Structural crack | Field survey | MK-QAB-03 | 93% |
| 31 Jul 2025 | 1.2 mm · +2 | 5% | 9% | 63% | Water ingress | H. Al-Sharif | MK-QAB-03 | 89% |
| 03 Feb 2025 | 0.8 mm · +2 | 4% | 7% | 52% | Salt crystallisation | H. Al-Sharif | MK-QAB-03 | 96% |
| 09 Aug 2024 | 0.5 mm · +2 | 1% | 8% | 73% | Salt crystallisation | H. Al-Sharif | MK-QAB-03 | 91% |
Field note
Irrigation well head serving the palm terraces; the old wells are documented for Al-Qabil. Guardian: H. Al-Sharif.
Site reference: Najran Municipality — أبرز معالم نجران.