A 4-INCH HOLLOW BLOCK (ALSO KNOWN AS A CONCRETE MASONRY UNIT OR CMU) IS A COMMON BUILDING MATERIAL USED PRIMARILY FOR CONSTRUCTING NON-LOAD-BEARING WALLS AND PARTITIONS. ITS HOLLOW CORES MAKE IT LIGHTER THAN SOLID BLOCKS, FACILITATING EASIER HANDLING AND PROVIDING BETTER THERMAL AND SOUND INSULATION.

WHILE EXACT DIMENSIONS CAN VARY SLIGHTLY BY MANUFACTURER, THE COMMON SPECIFICATIONS FOR A 4-INCH HOLLOW BLOCK IN MALAYSIA ARE CONSISTENT:
NOMINAL THICKNESS: 4 INCHES (APPROXIMATELY 100 MM OR 95 MM).
DIMENSIONS: THE STANDARD DIMENSIONS ARE OFTEN AROUND 390MM (LENGTH) X 190MM (HEIGHT) X 100MM (THICKNESS) OR 380MM (L) X 180MM (H) X 95MM (W).
WEIGHT: APPROXIMATELY 7–11 KG PER UNIT, DEPENDING ON THE SPECIFIC SIZE AND MANUFACTURER.
MATERIAL: MADE FROM CEMENT, SAND, AND AGGREGATES.
PACKING: TYPICALLY SOLD IN PALLETS OF AROUND 120 TO 150 PIECES.

FEATURES AND BENEFITS
LIGHTWEIGHT: REDUCED UNIT WEIGHT MAKES HANDLING AND TRANSPORTATION EASIER COMPARED TO SOLID BRICKS.
INSULATION: THE AIR TRAPPED IN THE HOLLOW CORES HELPS IMPROVE THERMAL MODERATION AND REDUCE SOUND TRANSMISSION BETWEEN ROOMS.
DURABILITY: OFFERS HIGH LEVELS OF FIRE RESISTANCE AND OVERALL STRENGTH. WHEN CORES ARE FILLED WITH CONCRETE, THEY CAN ACHIEVE HIGH FIRE RATINGS.
FINISH: SMOOTH FACES ACCEPT PLASTER OR RENDER DIRECTLY FOR A RAPID AND NEAT FINISH.