| No | Factors Due to Structural Design | Mean | Standard Deviation | The Relative Weight (%) | The Value of the Test | P- Value | Rank |
|---|---|---|---|---|---|---|---|
| 1- | Non-compliance with the requirements of design codes and their updates. | 3.73 | 1.27 | 74.60 | 4.41 | 0.00 | 11 |
| 2- | Ignoring soil investigation or Poor soil investigation leads to a wrong selection of foundation type. | 4.22 | 1.00 | 84.40 | 9.36 | 0.00 | 1 |
| 3- | Ignoring environmental, weather condition, biological and chemical attacks. | 3.00 | 1.17 | 60.00 | 0.00 | 1.00 | 17 |
| 4- | Ignoring building locations such as buildings located near the sea. | 3.27 | 1.13 | 65.40 | 1.85 | 0.07 | 14 |
| 5- | Ignoring lateral loads effects (winds and earthquakes). | 3.39 | 1.05 | 67.80 | 2.85 | 0.01 | 13 |
| 6- | Exceeding allowable deflection limits. | 3.91 | 1.01 | 78.20 | 6.87 | 0.00 | 6 |
| 7- | Ignoring dynamic loads impact on structural stability. | 3.00 | 1.11 | 60.00 | 0.00 | 1.00 | 16 |
| 8- | Ignoring the design of expansion, contraction, settlement joint and special construction joint. | 3.88 | 0.97 | 77.60 | 7.01 | 0.00 | 9 |
| 9- | Inadequate concrete cover on reinforcement. | 4.07 | 1.02 | 81.40 | 8.08 | 0.00 | 2 |
| 10- | Improperly locating conduits and pipe openings at critical structural locations. | 3.90 | 0.98 | 78.00 | 7.06 | 0.00 | 7 |
| 11- | Insufficient sizing of structural elements such as reducing the size of columns, the size of reinforcement bars and foundations. | 3.98 | 1.20 | 79.60 | 6.31 | 0.00 | 3 |
| 12- | Misjudgment in design leading to assumptions or decisions that are not consistent with the actual behavior of the structure. | 3.64 | 0.89 | 72.80 | 5.58 | 0.00 | 12 |
| 13- | A roof design without inverted beams, which allows water intrusion. | 3.86 | 1.14 | 77.20 | 5.84 | 0.00 | 10 |
| 14- | Inadequate slab types and loading ways with no consideration for codes related rules especially in long spans and cantilevers. | 3.97 | 1.03 | 79.40 | 7.18 | 0.00 | 4 |
| 15- | Designing residential buildings away from the municipality’s conditions and engineering association rules. | 3.90 | 1.30 | 78.00 | 5.32 | 0.00 | 8 |
| 16- | Lack of technical specification references for residential buildings. | 3.93 | 1.09 | 78.60 | 6.50 | 0.00 | 5 |
| 17- | Not defining adequate materials. | 3.16 | 1.17 | 63.20 | 1.01 | 0.32 | 15 |