Abstract
This research aim to evaluate the concise rocedure for analysis and design of Reinforced concrete structure to resist internal blast pressure. This evaluation will be locate the required thickness of the roof structure in addition the quantity , ship and connection mechanism of steel reinforcement. In order to verify the asuracy of the theoretical analysis and design procedure of Reinforced concrete roof structure to resist internal blast pressure. It was intended to carry out a field test for the structure designed after specified the internal dimensions of the structure (3.30*3.30*2.60)m , charge weight (1.5) kg and the ecommended degree of protection usually in terms of ductility ratio= 2.0.The natural period and the dynamic load factor were also calculated for the above structure .The objective of the test was justified since no scabbing from the roof was observed this means the thickness (25) cm of roof can keep all the out side individuals, equipment and buildings safe and away from the danger of fire and fragmentation during the period of blast pressure . The individuals and equipment should be kept clear away from the venting zone. A good agreement was found between the. theoretical and experimental results.