## 1 Introduction  
Blast-resistant buildings are designed for use in hazardous industries, such as oil and gas industry projects where various types of fires (such as pool and jet fires) as well as vapor cloud explosions are common in different hazardous scenarios. These multidisciplinary complicated projects have a clear path to specify hazards and explosions in order to define the necessity of blast-resistant buildings. In this regard, first, different hazards through a hazard and operability (HAZOP) and hazard identification (HAZID) analysis are identified. Consequently, a safety impact level analysis (SIL) evaluates the probability of safe operation in different risky scenarios. Afterwards, based on a consequence analysis (CA), a project is zoned, and its layout is designed. Finally, if important buildings, such as control rooms, are located in one of the hazardous areas, the building has to be designed to resist an explosion wave. Identifying probable and possible dangers means a critical role in preparing to confront and resist the negative effects of radical attacks in urban zones and regions. The main aim of pathology is to identify facilities, immunize the answers of buildings to radical attacks, and resist the effects of explosions [1]. On the one hand, the resistance of a building to an explosion wave depends on the shape and the form of the building and the roof, the number of entries and casements, and the power and genus of the materials used. On the other hand, a building facade is considered to be the first barrier protecting against waves of a proximate explosion. Thus, it seems important to study and evaluate various materials used in a facade against the consequences of an explosion. In Iran, an outer facade is usually built after constructing the outer wall, which consists of some materials such as decorative brick, cement, and stone. This research compared different types of building facades against explosion waves. The materials used in a building play an important role in a building's vulnerability. Considering the influence and role of building materials in the effects of an explosion, buildings can be classified into three different categories, according to studies of and experience from previous wars and recent wars [2]:  
* Buildings with damage-aggravating materials: A glass facade can be considered to be an example of this category. Basically, glass facades severely increase people's vulnerability to the environment. The surface under falling glass pieces will extend proportionally to incremental height. Thus, a lot of fatal glass pieces will be thrown outside just by the effects of the sonic barrier being broken;
* Buildings with vulnerable materials: Some materials or a combination thereof are not resistant enough against waves and quivers, and they will cause serious damage at the time of an explosion;
* Buildings with fewer vulnerable materials: Some buildings whose facades are composed of rigid-like materials, such as concrete, or a combination of materials, such as fibrous concrete, can be put into this category. These buildings can be more resistant to explosions and will be less vulnerable. Thus, due to the mentioned cases, the main goal of this research was the absence of indices for assessing and selecting the best kinds of materials to use in the facades of buildings in Iran. In the field of buildings resistant to explosion, a lot of research has been done. Some of it is mentioned now. [PERSON] & [PERSON] [3] studied the structure geometry of preventing blast waves from getting to buildings. The results fundamentally concluded that in geometric shapes, maximum pressures and maximum impulses depend on the distance from the explosion location, the confliction angle of explosion waves, and the resistance to the progress of waves of structural shapes. The shape of structural ingredients or building ingredients is certainly able to decrease explosion loads. [PERSON] & [PERSON] [4] accomplished similar research.