Maintenance work on building façades is a very current and widespread problem in the construction industry. Residential buildings constructed in the second half of the 20th century, with reinforced concrete frame structures, already show the first signs of physical deterioration after the first 30-40 years of life. Maintenance work, especially in southern Italy, is generally not carried out immediately, but is divided into two stages: the first stage involves making the building safe (so-called emergency maintenance) by removing unsafe parts; the second stage, sometimes years later than the first, involves completing the work by restoring the façades (so-called deferred maintenance). Often, maintenance interventions are postponed due to the excessive incidence of scaffolding, with the consequent worsening of the initial conditions of deterioration. The study therefore aimed to develop a model for the evaluation of the most economically convenient scaffolding system, in relation to the size of the intervention and the morphological complexity of the building. In particular, the method aimed at estimating the convenience factor of the type of equipment for the maintenance works on the facades of buildings, through the development of an equation whose variables are: duration of the intervention, cost of the equipment, hourly cost of labour, no. of components of the type team. These data are cross-referenced with a corrective coefficient, Coefficient of Morphological Complexity of the building (CCM), which defines the level of accessibility of the facades for the installation of service equipment. The results show that for urgent maintenance work, an elevating work platform is always convenient, regardless of the type of façade. For deferred maintenance work, a fixed scaffold or, where possible, a self-erecting scaffold is advantageous. As far as the cost-effectiveness of the maintenance phases is concerned, it appears that for tower buildings with a height of more than 20 metres, it will be more advantageous to carry out maintenance work as a unit. On the other hand, for a building with a height of less than 20 metres, splitting up the maintenance work involves the same costs as if the work were carried out as a unit.
FEASIBILITY ASSESSMENT OF WORKING AT HEIGHT EQUIPMENT, IN RESIDENTIAL BUILDINGS MAINTENANCE
Giacomo Di Ruocco
;Roberta Melella
2022-01-01
Abstract
Maintenance work on building façades is a very current and widespread problem in the construction industry. Residential buildings constructed in the second half of the 20th century, with reinforced concrete frame structures, already show the first signs of physical deterioration after the first 30-40 years of life. Maintenance work, especially in southern Italy, is generally not carried out immediately, but is divided into two stages: the first stage involves making the building safe (so-called emergency maintenance) by removing unsafe parts; the second stage, sometimes years later than the first, involves completing the work by restoring the façades (so-called deferred maintenance). Often, maintenance interventions are postponed due to the excessive incidence of scaffolding, with the consequent worsening of the initial conditions of deterioration. The study therefore aimed to develop a model for the evaluation of the most economically convenient scaffolding system, in relation to the size of the intervention and the morphological complexity of the building. In particular, the method aimed at estimating the convenience factor of the type of equipment for the maintenance works on the facades of buildings, through the development of an equation whose variables are: duration of the intervention, cost of the equipment, hourly cost of labour, no. of components of the type team. These data are cross-referenced with a corrective coefficient, Coefficient of Morphological Complexity of the building (CCM), which defines the level of accessibility of the facades for the installation of service equipment. The results show that for urgent maintenance work, an elevating work platform is always convenient, regardless of the type of façade. For deferred maintenance work, a fixed scaffold or, where possible, a self-erecting scaffold is advantageous. As far as the cost-effectiveness of the maintenance phases is concerned, it appears that for tower buildings with a height of more than 20 metres, it will be more advantageous to carry out maintenance work as a unit. On the other hand, for a building with a height of less than 20 metres, splitting up the maintenance work involves the same costs as if the work were carried out as a unit.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
