Drilling Holes In Tji Floor Joists

Minimum applies to all holes except knockouts closely grouped round holes are.

Drilling holes in tji floor joists.

Scan horizontally until you intersect the cor rect hole size. The diameter of holes shall not be greater than 1 3 the depth of the floor joists. Design properties 16 floor span and load. When joists are continuously supported the flanges can be occasionally notched because the joist is only transferring vertical loads.

Refer to the hole chart on page 9 of the tji specifiers guide for uniformly loaded 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. They are located 3 away horizontally edge to edge from a larger hole. 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. Floor performance and tj pro rating 4 5 section 1. Ilevel trus joist tji joist specifier s guide tj 4001 march 2007 11 how to use these tables 1.

Using table a table b or both if required determine the hole shape size and select the tji joist and depth. Away from the top and bottom. 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. Minimum distance from table b 1 round holes may be cut anywhere in web outside of hatched zone if.

Where and how to drill joists for electrical cables or. Permitted if the group perimeter meets requirements for round. Drilling floor joists to run plumbing wiring or ducts can be tricky.