Research and development of Indonesian Seismic Hazard Maps in 2017 (IHSM-2017) have a direct impact on the development of seismic resistance code for building design in Indonesia. The development of new Indonesian seismic code for building and non-building design is still on-going, following the development of ASCE/SEI 7-16. This paper describes the development of design acceleration response spectrum (DARS) for building design. DARS-2019 is developed following the same method describes in the Indonesian seismic code [9] and ASCE/ SEI 7-16. The study for developing DARS-2019 was performed at 35 cities in Central Java and Yogyakarta Provinces, Indonesia. A comparative study with 2012 seismic code (DARS-2012) was also performed in this study to evaluate the improvement of the DARS at those 35 cities. The analysis was performed for three different site soil classes (hard soil/SC, medium soil/SD and soft soil/SE). The purpose of this study is to evaluate the direct impact of the new ISHM-2017 on DARS-2019. Based on the analysis conducted at 35 cities, the improvement of DARS-2019 compared to DARS-2012 for site classes SC, SD and SE are less than 0.1 g except for site class SC at five cities located close to Opak fault trace.

One of the disasters that must be noticed in mountains and hills is landslide. This is especially if the area is used as settlement. Semarang as metropolitan city with various topography is not separated from the use of its hilly area into residential areas. One of them is in Gunungpati District. However, this utilization of land can cause this area prone to landslide. Sukorejo Village, especially in Citizenship Association (CA) VI, is the landslide prone areas in Gunungpati District, Semarang. Almost every year, Citizenship Association (CA) VI of Sukorejo Village experiences landslide causing damage to infrastructures. Therefore it is needed to analyse the landslide vulnerability in Citizenship Association (CA) VI of Sukorejo Village. Thus, the vulnerability of the area is evaluated as disaster mitigation in accordance with physical, social, economic and institutional criteria. This study utilized quantitative method by scoring analysis to measure the level of landslide vulnerability. The vulnerabilities which were analysed were physical, social, economic, and institutional. The results of this study indicate that settlement in Citizenship Association (CA) VI of Sukorejo Village has high physical vulnerability, moderate to high social vulnerability, moderate economic vulnerability and low institutional vulnerability to disaster.

New normal era is being done in many countries after COVID-19 pandemic. This era allows people back to office with certain condition. Many requirements must be fulfilled in workplace before starts new normal era. This study aims to identification workplace requirements in new normal era. Evaluation of this study obtained from design engineering criteria and health environment perspective which used literature review method. Based on the analysis, it shows that there are many requirements that must be fulfilled to create safety zone in workplace in new normal era such as workspace layout, ventilation, lighting, establishment of equipment, and thermal comfort. Design of workplace which is ergonomic and health environment also be developed in this research. However, employee still keep applying health protocol in office.

One of the hazards that usually occur in slope is landslide. This disaster can occur due to various factors, such as soil material, load on the slope, and the presence of groundwater. Retaining wall is one of the reinforcements that can be applied in slope. This reinforcement is expected to overcome the landslide hazard that can possible to occur. For the conventional retaining wall in kind of gravity wall, the weight of structure influences the stability to retain the slope. Moreover, the weight of retaining wall is determined by its dimension. The assumptions of retaining wall dimension is determined by trial and error. If retaining wall is not enough to bear the load, the dimension of the retaining wall must be changed. In this study, analysing conventional gravity type of retaining walls with several variation designs in 3 meters vertical slope. As the limitation of this study, there are two layers cohesive soil behind the retaining wall. The retaining wall only relies on the weight of the structure as the basis of its design. Therefore, the relation between weight of retaining wall with stability of the structure itself can be known. Thus, the design of the suitable retaining wall that is used on the vertical slope in this study can be obtained. Results show that the greater the retaining wall, the value of the safety factor will increase. The design of the retaining wall with sloping wall on the front of the retaining wall gives greater safety factor than the design of the retaining wall with the slender shape.

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