This paper is for to propose the shear strength equation by using results of former researchers like as Lubell et al.(2008) and Kim et al.(2016). Support width was chosen as the variables and experiment was conducted. Proposed equation was estimated accurately and safely rather than Lubell’s proposal.

• 강주원(영남대학교 건축학부) | Kang, Joo-Won
• 이창현(경희대학교 건축공학과) | Lee, Chang Hyun
• 이영학(경희대학교 건축공학과) | Lee, Young Hak 교신저자