Drilling Holes In Tji Floor Joists

Ilevel trus joist tji joist specifier s guide tj 4001 march 2007 11 how to use these tables 1.

Drilling holes in tji floor joists.

The diameter of holes shall not be greater than 1 3 the depth of the floor joists. When joists are continuously supported the flanges can be occasionally notched because the joist is only transferring vertical loads. Minimum applies to all holes except knockouts closely grouped round holes are. Away from the top and bottom.

Scan horizontally until you intersect the cor rect hole size. Where and how to drill joists for electrical cables or. Floor performance and tj pro rating 4 5 section 1. Refer to the hole chart on page 9 of the tji specifiers guide for uniformly loaded joists.

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. Drill holes with a diameter of no more than one third the depth of the joist staying 2 in. There are very specific locations and sizes in the code telling you what is allowed. Of walls and rim joists.

Design properties 16 floor span and load. Permitted if the group perimeter meets requirements for round. Using table a table b or both if required determine the hole shape size and select the tji joist and depth. Holes anywhere in the web area of engineered i joists except within 6 in.

For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over. Minimum distance from table b 1 round holes may be cut anywhere in web outside of hatched zone if. 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.