Number of Occurrences | Symbol | Causes of failure |
a. Triggering causes of failure | ||
3 | a | Heavy rain causing falsework foundation slippage |
1 | b | Strong river current causing falsework foundation slippage |
1 | c | Strong winds |
4 | d | Fire |
5 | e | Failure of equipment for moving formwork |
4 | f | Effects of formwork component failure |
1 | g | Concentrated load due to improper prestressing operation |
2 | h | Β Concentrated load due to construction material |
2 | i | Other imposed loads |
27 | j | Β Impact loads from concrete debris and other effects during concreting |
3 | k | Impact load from construction equipment/vehicles |
5 | l | Vibration from nearby equipment/vehicles or excavation work |
6 | m | Effect of improper/premature falsework or formwork removal |
20 | n | Other causes or not available |
b. Enabling causes of failure | ||
17 | A | Inadequate falsework cross- bracing/lacing |
14 | B | Inadequate falsework component |
9 | C | Inadequate falsework connection |
7 | D | Inadequate falsework foundation |
8 | E | Inadequate falsework design |
4 | F | Insufficient number of shoring |
1 | G | Inadequate reshoring |
4 | H | Failure of movable falsework/formwork components |
2 | I | Improper installation/maintenance of construction equipment |
1 | J | Failure of permanent structure component |
4 | K | Inadequate soil foundation |
2 | L | Inadequate design/construction of a permanent structure |
30 | S | Other causes or not available |
C. Procedural causes of failure | ||
23 | M | Inadequate review of falsework design/construction |
22 | N | Lack of inspection of falsework/formwork during concreting |
2 | O | Improper concrete test prior to removing falsework /formwork |
4 | P | Employment of inexperienced/inadequately trained workmen |
1 | Q | Inadequate communication between parties involved |
5 | R | Change of falsework design concept during construction |
38 | T | Other causes or not available |
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