| Metal Connectors. In structures
using one-hour rated glulams, supporting metal connectors and fasteners also May be
designed to achieve a one-hour fire rating. A 1-1/2" covering of wood, fire-rated
(Type X) gypsum wallboard or any coating approved for a one-hour rating provides the
needed protection. For further information, see EWS Technical
note EWS Y245, Calculating Fire Resistance of Glulam Beams and Columns.
| TABLE 33 |
| ONE-HOUR FIRE-RATED GLULAM
BEAMS-MINIMUM DEPTHS FOR 6-3/4" AND 8-3/4" WIDE BEAMS |
| Beam Width (inches) |
Minimum Depth (inches) |
| 3 Sides Exposed |
4 Sides Exposed |
| 6-3/4 |
13-1/2 |
27 |
| 8-3/4 |
7-1/2 |
13-1/2 |
| TABLE 34 |
| ONE-HOUR FIRE-RATED GLULAM BEAMS-MINIMUM
DEPTHS FOR 8-3/4" AND 10-3/4" WIDE BEAMS |
|
|
Minimum Depth
(inches) |
| l/d Criteria |
Column Width (in.) |
3 Sides Exposed |
4 Sides Exposed |
| l/d>11 |
8-3/4 |
15 |
30 |
| 10-3/4 |
10-1/2 |
13-1/2 |
| l/d<11 |
8-3/4 |
9 |
12 |
| 10-3/4 |
7-1/2 |
10-1/2 |
l = column length in inches.
d = column least cross-sectional dimension in inches.
|
