joist nail 中文意思是什麼
joist nail
解釋
擱柵釘-
In joist ' s temporary fixation, if temporary bolt and drill nail are used, amount of them should be calculated as flowed specification : the amount should be no less than 1 / 3 of all holes ; at least, two temporary bolts should be used ; amount of drill nail should be no more than 30 % of temporary bolts bolted ( grade a, grade b ) hole shouldn ' t be fixed with drill nail
桁架臨時固定如需用臨時螺栓和沖釘,則每個節點處應穿入的數量必須由計算確定,並應符合下列規定:不得少於安裝孔總數的1 / 3 ;至少應穿兩個臨時螺栓;沖釘穿入數量不宜多於臨時螺栓的30 % ;擴鉆后的螺栓( a級、 b級)的孔不得使用沖釘。
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