| StrucJoist HOLE CHARTS ROUND HOLE CHART MINIMUM DISTANCE FROM FACE OF ALL JOIST SUPPORTS TO
CENTER OF HOLE. -
| JOIST SERIES |
JOIST DEPTH |
ROUND
HOLE DIAMETER |
| 3" |
4" |
5' |
6" |
6-1/4" |
7" |
7" |
8-5/8" |
9" |
10" |
10-3/4" |
12" |
12-3/4" |
| SJ-15 |
9-1/2" |
2'-6" |
3'-6" |
4'-6" |
5'-6" |
6'-0" |
- |
- |
- |
- |
- |
- |
- |
- |
| 11-7/8" |
1'-6" |
2'-6" |
3'-6" |
4'-6" |
4'-6" |
5'-6" |
6'-6" |
8'-0" |
- |
- |
- |
- |
- |
| SJ-25 |
9-1/2" |
3'-0" |
4'-0" |
5'-0" |
6'-6" |
7'-0" |
- |
- |
- |
- |
- |
- |
- |
- |
| 11-7/8" |
2'-0" |
3'-0" |
4'-0" |
5'-0" |
5'-6" |
5'-6" |
8'-0" |
9'-6" |
- |
- |
- |
- |
- |
| 14" |
1'-0" |
1'-0" |
2'-0" |
3'-6" |
4'-0" |
4'-6" |
6'-0" |
7'-0" |
7'-6" |
9'-0" |
11'-6" |
- |
- |
| 16" |
1'-0" |
1'-0" |
1'-0" |
1'-0" |
1'-0" |
2'-6" |
4'-0" |
5'-0" |
5'-6" |
7'-0" |
8'-0" |
10'-6" |
13'-0" |
| SJ-35 |
11-7/8" |
3'-6" |
4'-6" |
5'-6" |
7'-0" |
7'-6" |
8'-6" |
10'-0" |
11'-6" |
- |
- |
- |
- |
- |
| 14" |
1'-6" |
3'-0" |
4'-0" |
5'-6" |
6'-0" |
6'-6" |
8'-0" |
9'-0" |
10'-0" |
11'-6" |
13'-6" |
- |
- |
| 16" |
1'-0" |
1'-0" |
1'-6" |
3'-0" |
3'-6". |
5'-0" |
6'-6" |
7'-6" |
8'-0" |
9'-6" |
11'-0" |
13'-6" |
15'-0" |
| SJ-55 |
11-7/8" |
2'-6" |
4'-6" |
6'-0" |
7'-6" |
8'-0" |
9'-6" |
11'-0" |
12'-6" |
- |
- |
- |
- |
- |
| 14" |
1'-0" |
2'-6" |
4'-6" |
6'-0" |
6'-6" |
5'-0" |
10'-0" |
11'-0" |
11'-6" |
13'-6" |
15'-6" |
- |
- |
| 16" |
1'-0" |
1'-0" |
2'-0" |
3'-6" |
4'-0" |
5'-6" |
7'-0" |
8'-6" |
9'-0" |
11'-6" |
13'-0" |
16'-0" |
18'-0" |
DO NOT CUT HOLES LARGER THAN 2" IN CANTILEVER.
- DO NOT CUT OR DAMAGE FLANGES.
- THE CLEAR DISTANCE BETWEEN HOLES SHALL EQUAL OR EXCEED TWICE
THE DIAMETER OF THE LARGEST HOLE OR TWICE THE LONGEST SIDE OF A RECTANGULAR HOLE.
- EXCEPT AS NOTED IN 1 AND 2 ABOVE, A 2" DIAMETER HOLE IS
PERMITTED TO BE DRILLED ANYWHERE.
- THE LONGEST SIDE OF A RECTANGULAR HOLE SHALL NOT EXCEED
THREE-FOURTHS OF THE ALLOWABLE ROUND HOLE DIAMETER.
- THIS TABLE IS APPLICABLE ONLY FOR UNIFORMLY LOADED
STRUCJOIST DESIGNED USING THE ROOF AND FLOORSPAN TABLES IN THIS REPORT. CONTACT WILLAMETTE
INDUSTRIES FOR OTHER APPLICATIONS.
- EXTERIOR SPANS OF MULTIPLE SPAN APPLICATIONS SHALL BE AT
LEAST 40 PERCENT OF THE ADJACENT SPAN.
FULL DEPTH RECTANGULAR HOLE CHART
MAXIMUM HOLE LENGTH (IN.).
| JOIST SERIES |
JOIST DEPTH |
JOIST SPACING (IN. o.c.) |
| 12 |
16 |
19.2 |
24 |
| SJ-15 |
ALL DEPTHS |
12 |
8 |
6 |
6 |
| SJ-25 |
9-1/2" & 11-7/8" |
13 |
9 |
8 |
8 |
| 14" & 16" |
9 |
8 |
8 |
8 |
| SJ-35 |
ALL DEPTHS |
12 |
10 |
10 |
10 |
| SJ-55 |
ALL DEPTHS |
12 |
10 |
8 |
8 |
- DO NOT CUT OR DAMAGE FLANGES. DO NOT OVERCUT CORNERS OF
HOLES.
- FULL DEPTH RECTANGULAR HOLES SHALL BE LOCATED AT CENTER OF
SPAN.
- A FULL DEPTH RECTANGULAR HOLE IS ONLY ALLOWED IN LONGEST
SPAN OF MULTIPLE SPAN JOISTS.
- THIS TABLE IS VALID FOR RESIDENTIAL SPANS THAT MEET THE
FLOOR SPANS IN THE TABLES OF THIS EVALUATION REPORT. CONTACT WILLAMETTE INDUSTRIES FOR
OTHER APPLICATIONS.
- OTHER HOLES ARE NOT ALLOWED WTHIN THREE TIMES THE HOLE
LENGTH SPECIFIED IN TABLE.
- ALLOWABLE DEPTH OF HOLE IS DEPTH OF WEB MINUS 1/4"
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