Subassemblages of several panel aspect ratios consisting of weak-axis H-column and strong-axis Hbeam are first analyzed and it is examined in what range weak panel structures are achieved. Then, crosstype steel subassemblages consisting of weak axis H-column and strong axis H-beam are tested under cyclic horizontal loads and the constant axial force of the column. Theoretical plastic shear strength Qpp of a weak axis panel is presented and simplified plastic strength is also presented for designer's convenience. Yield strength of the panel is obtained by Qpp /1.5. Validity of these analytical strengths are proved by these experimental results.
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