Drilling Holes In Tji Floor Joists
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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.
Drilling holes in tji floor joists. Where and how to drill joists for electrical cables or plumbing runs depends on what type of floor framing you have. Using table a table b or both if required determine the hole shape size and select the tji joist and depth. Refer to the hole chart on page 9 of the tji specifiers guide for uniformly loaded joists. If you have manufactured floor joists you will want to consult the particular manufacturer s literature.
0 25 x depth of joist. For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches. Holes cannot be closer than 2 to. Minimum applies to all holes except knockouts closely grouped round holes are.
They are located 3 away horizontally edge to edge from a larger hole. Keep the hole at least 2 in. Trus joist tji joist specifier s guide tj 4000 july 2019. Trus joist tji 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. 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. Minimum distance from table b 1 round holes may be cut anywhere in web outside of hatched zone if. Scan horizontally until you intersect the cor rect hole size column.
Centre line 0 25 0 4 x span. The diameter of holes shall not be greater than 1 3 the depth of the floor joists. 7 2 10 strutting for attic trusses and cut roofs that form a floor. The hole cannot be larger than one third the depth of the joist so the maximum hole size for a 2 12 joist actual size 1 1 2 x 11 1.
Permitted if the group perimeter meets. Ilevel trus joist tji joist speciļ¬er s guide tj 4001 march 2007 11 how to use these tables 1. Measurement shown is minimum distance from edge of hole to. From the top and the bottom if it s a dimensional lumber joist.
Preformed holes should be provided in the web and. Holes or notches should not be cut without the. Fire safe construction 3 floor performance and tj pro rating 4 5 section 1.
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