Drilling Holes In Tji Floor Joists

The diameter of holes shall not be greater than 1 3 the depth of the floor joists.

Drilling holes in tji floor joists.

Where and how to drill joists for electrical cables or. 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.

They are located 3 away horizontally edge to edge from a larger hole. Scan horizontally until you intersect the cor rect hole size. Away from the top and bottom. Permitted if the group perimeter meets requirements for round.

Minimum distance from table b 1 round holes may be cut anywhere in web outside of hatched zone if. Holes anywhere in the web area of engineered i joists except within 6 in. 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.

Of walls and rim joists. 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. Drilling floor joists to run plumbing wiring or ducts can be tricky.

Design properties 16 floor span and load. There are very specific locations and sizes in the code telling you what is allowed. For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over.