Drilling Holes In Tji Floor Joists

Floor performance and tj pro rating 4 5 section 1.

Drilling holes in tji floor joists. Minimum applies to all holes except knockouts closely grouped round holes are. Minimum distance from table b 1 round holes may be cut anywhere in web outside of hatched zone if. There are very specific locations and sizes in the code telling you what is allowed. Drill holes with a diameter of no more than one third the depth of the joist staying 2 in.

When joists are continuously supported the flanges can be occasionally notched because the joist is only transferring vertical loads. Away from the top and bottom. The diameter of holes shall not be greater than 1 3 the depth of the floor joists. Where and how to drill joists for electrical cables or.

Scan horizontally until you intersect the cor rect hole size. Refer to the hole chart on page 9 of the tji specifiers guide for uniformly loaded joists. Ilevel trus joist tji joist specifier s guide tj 4001 march 2007 11 how to use these tables 1. For information specific to holes in continuously supported tj rim board timberstrand lsl timberstrand lsl rim board and tji rim joists see guidelines for notches in rim board tb 224.

9 16 tji joists design properties 6 floor span and load tables 7 8 tips for preventing floor noise 8 allowable holes 9 cantilevers 10 11 roof span and load tables 12 13 framing connectors 14 15 section 2. Of walls and rim joists. Permitted if the group perimeter meets requirements for round. Design properties 16 floor span and load.

They are located 3 away horizontally edge to edge from a larger hole. Often hole size can be increased and holes can be placed closer to bearing than shown on the chart based on actual design spans and loads. Using table a table b or both if required determine the hole shape size and select the tji joist and depth.