Dimensions in Light (Weck Glass Block/Glashaus, Inc.)

Fire Rating	Block Thickness	Wall Type	Max. Dimension	Max. Sq. Ft.
45	4"	Masonry	12	120
45	3"	Masonry	12	100
45	4"	Gypsumboard	10-3/4	94
45	3"	Gypsumboard	10-3/4	94
60	4"	Masonry	10	100
60	4"	Gypsumboard	10-3/4	94
90	4"	Masonry	10	100

Tested by UL-9, a test for window assemblies.
Corner blocks, end blocks and 12 ¥ 12 sizes are not fire-rated.

Fire-rated installations are no barrier for WECK firestop blocks. WECK offers many options for fire-rated applications. Both thinline and standard thickness blocks are 45 minute fire-rated as protected openings in masonry or gypsumboard fire-rated walls.

Blocks may be connected to walls by channels or panel anchors. WECK blocks are rated with panel anchors in 60 minute protected openings.

For 60 minute openings use Nubio-60, Clarity-60, Fortress Ribbed, Fortress-Nubio, Fortress Clarity or Fortress Arctic. For 90 minute openings, specify Clarity-90.

Fortress extra-heavy block minimizes vandalism. (Available in Nubio, Clarity, Arctic and Ribbed patterns.)

wkg03c.jpg (3127 bytes)
Nubio -60
WECK Firestop-60
Square Size: 8" x 8" x 3-7/8"
U.L. File R 11679-3

Clarity-60
WECK Firestop-60
Square Size: 8" x 8" x 3-7/8"
U.L. File R 11679-3

wkg03e.jpg (2662 bytes)
Clarity-90
WECK Firestop-90
Square Size: 6" x 6" x 3-7/8"
U.L. File R 11679-4

OPENINGS IN GYPSUMBOARD WALLS

wkg03g.jpg (9973 bytes)

Clarity-60
WECK Firestop-60
Square Size: 8" x 8" x 3-7/8"
U.L. File R 11679-3
Also available in Nubio/Clear Ribbed pattern.

Firestop Blocks