Maximum Hole Size In Engineered Floor Joist

You can drill the holes anywhere along the length of the joist first photo.

Maximum hole size in engineered floor joist.

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 4 in is 3 3 4 in. With these factors the lightest joist will have a maximum span of 17 feet 8 inches. The heaviest joist along with the above factors will span a maximum of 23 feet 8 inches. Notches can t be deeper than one sixth of the joist depth.

Diameter plenty big enough for running cable. At bearing locations the stiffeners shall be installed tight to the bottom flange. For simple span 5 minimum uniformly loaded joists meeting the requirements of this guide one maximum size round hole may be located at the center of the joist span provided that no other holes occur in the joist. Apa performance rated i joists pris are manufactured in accordance with pri 400 performance standard for apa ews i joists form x720 this performance standard provides an easy to use table of allowable spans for applications in residential floor construction allowing designers and builders to select and use i joists from various member manufacturers using just one set of span.

Web stiffeners shall be cut to fit between the flanges of the lp solidstart i joist leaving a minimum 1 8 gap 1 maximum. For other load conditions or hole configurations use. 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.

Minimum distance from table b 1 round holes may be cut anywhere in web outside of hatched zone if. This is the most common as the typical span is 15 feet. At locations of concentrated loads the stiffeners shall be installed tight to the top flange. Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability.

Minimum applies to all holes except knockouts closely grouped round holes are. Permitted if the group perimeter meets requirements for round or square holes. The maximum allowable diameter of a hole in any solid lumber joist is one third of the joist s depth. In the case of your 2 10 joists the maximum diameter is 35 64 in.