The dulang module is a key measurement system in the construction of Palembang limas house, with a length specification of six dulang per bengkilas, each containing a dish for eight people. A smaller dulang module is also found in Malay standard houses in Malaysia to determine the size of the porch, so than the question arises as to why dulang is used as a measurement base for these two types of Malay houses. This paper presents a number of factors that allow the dulang module to emerge as a porch/bengkilas measurement system. This research uses the PESTLE (Political, Economic, Sociological, Technological, Legal, Environmental) framework as a base for exploration of related interdisciplinary literature. It was found that open culture, maritime economics, collectivism, house technology without nails and metals, Islamic teachings on cleanliness, alms, norms of egalitarianism, wood supply, and windy environment are the factors that encourage the use of the eight-person dulang module as the length measurement system of bengkilas in Palembang limas house.