Scored
Block
 Scored block is available with 1, 2, 3, 5
or 7 ribs as illustrated, corner units with ribs on the end, also available. In addition
to being scored these units are also available with a Stri-Face. Detail of some standard
grooves shown right.
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If this hollow unit is 50% core voids
It's equivalent solid
thickness is 4"
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Equivalent
thickness is the solid thickness that would be obtained if the same amount of concrete
contained in a hollow unit were re-cast without core holes. Calculating Estimated Fire Resistance Example: An 8"
hollow masonry wall is constructed of expanded slag units reported to be 55% *
solid. What is the estimated fire resistance of the wall? (modular units)
Eq Th = 0.55 x 7.625 in. = 4.19 inches.
From Table: 3 hr. Fire Resistance
requires 4.20 inches. Use minus 3 hr. est. resistance.
* Percentage solid can be calculated from
net area or net volume values as determined by ASTMC 140 "Methods of Testing Concrete
Masonry Units." |
