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  APA - The Engineered Wood Association   APA Residential & Commercial  

APA Residential & Commercial - Page 58

   

APA Residential & Commercial

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.

 



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