INGENIEUR
Figure 11 : Typical Control Joint Locations ( Source : Thomaz E ., ed al ., CIB W023- Wall Structures , International Council for Research and Innovation in Building and Construction . 2014 . p 32 .)
buildings , uplifting of the zinc sheeting occurs at basic wind speed over 89.1 m / s . Uplifting of roofs occurs in medium-rise buildings at a wind speed of 42 m / s . Extra tying down mechanism is needed to increase robustness against such uplifting by strong winds . For pitched roofs with roof tiles , British Standard “ BS 5534:2014 + A2:2018 Slating and tiling for pitched roofs and vertical cladding . Code of Practice ” specifies a new reinforcement and clipping system in view of stronger wind due to climate change .
Open terraces and walkways should be protected against the ingress of wind-induced rain . Storm-proof fenestrations with stronger reinforcement and tolerance for movement caused by thermal stress must be emphasised . Windows with sub-frames and curtain walls with stick systems that do not have any built-in drainage and tolerance for movement should be avoided . Besides , lighter colours with higher reflectance are preferred on the facades and roofs for thermal comfort as well as crack control .
Cool roofing , with the selection of light colour single ply membrane and vegetated roofs , are measures for the prevention of excessive heat that causes the horizontal volumetric expansion
Figure 10 : Heat profiles of different building materials in the Tropics
46 VOL 91 JULY-SEPTEMBER 2022