Maximum loads on joint. Tensile strain on gross section of under plate..... Gross sectional area of upper plate. Net sectional area of upper plate through line of three rivet holes. Bearing surface of rivets. Shearing area of rivets (single shear, 9 rivets) Square inches. 4. 51 3. 59 2. 78 4. 75 Pounds per sq. inch. 34,900 59, 100 43, 770 56, 640 34, 460 Tensile strain on gross section of upper plate Tensile strain on net section of upper plate across row of three rivet holes... 44,840 Compressive strain on bearing surface of rivets Shearing strain on rivets (9 rivets, single shear). 57,910 33,890 Gross sectional area of upper plate.. Net sectional area of upper plate through line of three rivet holes. Bearing surface of rivets Shearing area of rivets (single shear, 9 rivets). Square inches. 4.45 3.54 2.73 4.75 Fibrous fracture. Ultimate strength. Fractured upper plate through outside row of rivet holes. Maximum loads on joint. Tensile strain on gross section of upper plate Remarks. Tensile strain on net section of upper plate through row of three rivet holes.. 42, 680 Compressive strain on bearing surface of rivets.. Shearing strain on rivets 55, 350 31,810 Punched holes: Punch, ".753 diameter; die, ".774 diameter. 11/1 16 iron rivets, "Burden's best." Punched holes: Punch, ".753 diameter; die, ".774 diameter. Gross sectional area of upper plate.. Net sectional area of upper plate... Bearing surface of rivets Shearing area of rivets (".76 diameter) Square inches. 3.79 2.34 2.89 4.54 Pounds per sq. inch. Square inches. 3.75 2.32 2.87 4.54 Photograph of fractured plate, Joint No. 69, showing eccentricity of rivet heads; also showing scale started off rivet heads caused by the bending of the joint plates. No. 58.-" IRON AND STEEL PLATE. JOINT F ... 16 L15 iron rivets, "Burden's best." Punched holes: Punch, ".753 diameter; die, ".774 diameter. |