THINGS TO KNOW WHILE DESIGN BOLTS

• Shear plane is the common surface between connected materials based on the number of connecting parts the shear plane numbers vary. If the threads are included with shear plane (N type) the bolt bear the strength under bolt net area, if the threads are excluded with shear plane (X type) the bolt bear the strength under bolt gross area.
• A325T bolts stands the full length threaded bolts, the bolt length less than or equal to the four times the bolt diameter only.
• A307 Bolts tensile capacity is 45 ksi most of the cases it used as erection bolts in steel structures.
• 15^th Edition of AISC Manual introduced the Group C bolts such as F3043 for tension control bolts and F3111 for conventional High strength bolts.
• Slip critical bolted Connections used only when joints are subjected to fatigue loads or Joints that used oversized holes.
• 15^th Edition of AISC Manual the nominal bolt hole for 1 inch diameter of bolt get revised as the (d+1/8) rather than (d+1/16)
• Pre-tensioned bolted connections used only when joints are subjected to vibratory loads.
• Bolt Diameters limited to 1 inch due to the commonly available bolt installation equipment’s designed for that capacity. Special equipment’s required for larger diameter of bolts.
• To prevent the nut from loosening the threads can be spiked or marred or the nut can be tack welded to the base metal.
• Bevel washers are required to provide when the head and nut bear have a slope greater than 1:20 with respect to the plane normal to the bolt axis.
• 13^th Edition the Minimum Bolt Edge Distance is dependent to material cut such as thermal cut, sawed and sheared edges in such way limitations to edge distance were made accordingly.
• Updated 14^th and 15^th edition the edge conditions have been grouped, meanwhile made the limitations that prevents exceeding the bearing and tear out limits on minimum edge distance and it has met for all bolt holes.