Ash Grey Blocks & Bricks

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We are the leading manufacturer & retailer of Grey Blocks

Concrete Grey Blocks are manufactured utilising recycled fly ash to provide a lightweight, high strength product. Concrete Grey Blocks are commonly used for construction on houses, schools, and various commercial projects.

Choosing the right Concrete Grey Block

Before selecting, you should ensure this product meets your projects requirements. Certain Concrete Grey Blocks are lightweight, heavy duty and/or fire rated. Please check the Additional Information. Please consult National Masonry™ if you are unsure on the best Concrete Grey Block for your construction needs.

100 Series

Product Code	Product Name	Dimensions	Weight per unit (kg)	Units per pallet	Fire Rating	MPA
10.01AG	Standard	390x190x90	11.1	149	FRL = 60	(ƒ’uc ≥ 10MPa)
10.02AG	Three Quarters	290x190x90	8.7	192	FRL = 60	(ƒ’uc ≥ 10MPa)
10.03AG	Half	190x190x90	5.5	252	FRL = 60	(ƒ’uc ≥ 10MPa)
10.12AG	Bond Beam	390x190x90	10.1	108	FRL = 60	(ƒ’uc ≥ 10MPa)
10.71AG	Standard Half Height	390x90x90	5.6	300	FRL = 60	(ƒ’uc ≥ 10MPa)
10.201AG	Back-up hollow	390x162x90	10.1	172	FRL = 60	(ƒ’uc ≥ 10MPa)
10.31FR	Fire Rated Solid	390x190x90	11.6	139	FRL = 60	(ƒ’uc ≥ 8MPa)
10.32FR	Fire Rated Solid Three Quarter	290x190x90	10.2	192	FRL = 60	(ƒ’uc ≥ 8MPa)
10.33FR	Fire Rated Solid Half Length	190x190x90	6.8	252	FRL = 60	(ƒ’uc ≥ 8MPa)
10.34FR	Fire Rated Solid Quarter Length	90x190x90	3.3	504	FRL = 60	(ƒ’uc ≥ 8MPa)

120 Series

Website Image	Product Code	Product Name	Dimensions	Weight per unit (kg)	Units per pallet	Fire Rating	MPA	Notes
	12.01FR	Fire Rated Reduced Core	390x190x110	13.4	120	90 minutes	(ƒ’uc > 8MPa)	1 in 5 = Universal (Bolster 1/2 or 3/4)

150 Series

Product Code	Product Name	Dimensions	Weight per unit (kg)	Units per pallet	Fire Rating	MPA	Notes
15.42UNV	Channel	390x190x140	12.8	120	30 minutes or 120 minutes Grout Filled	(ƒ’uc ≥ 15MPa)
15.02AG	Three Quarter	290x190x140	10.5	128	30 minutes or 120 minutes Grout Filled	(ƒ’uc ≥ 15MPa)
15.03AG	Half	190x190x140	6.9	192	30 minutes or 120 minutes Grout Filled	(ƒ’uc ≥ 15MPa)
15.22AG	Seven Eighths	340x190x140	12.3	108	30 minutes or 120 minutes Grout Filled	(ƒ’uc ≥ 15MPa)
15.12AG	Lintel	390x190x140	17.8	96	30 minutes or 120 minutes Grout Filled	(ƒ’uc ≥ 15MPa)
15.71AG	Standard Half Height	390x90x140	7.5	216	30 minutes or 120 minutes Grout Filled	(ƒ’uc ≥ 15MPa)
15.48AG	H Block	390x190x140	14	120	30 minutes or 120 minutes Grout Filled	(ƒ’uc ≥ 15MPa)
15.83AG	Solid Half Height	390x90x140	10	168	120 minutes		With Frog
15.85AG	Solid Half Height 1/2 Length	190x90x140	5.1	336	120 minutes		With Frog
15.01FR	Fire Rated Standard Hollow	390x190x140	11	120	120 minutes	(ƒ’uc ≥ 8MPa)
15.02FR	Fire Rated Three Quarter	290x190x140	9.1	128	120 minutes	(ƒ’uc ≥ 8MPa)
15.03FR	Fire Rated Half	190x190x140	6.1	192	120 minutes	(ƒ’uc ≥ 8MPa)
15.22FR	Fire Rated Seven Eighths	340x190x140	10.7	108	120 minutes	(ƒ’uc ≥ 8MPa)
15.321FR	Fire Rated Backup Cored	390x162x140	13.0	120	120 minutes	(ƒ’uc ≥ 8MPa)
15.20LWS	Light Weight Structural	390x190x140	11.6	144	120 minutes	(ƒ’uc ≥ 15MPa)	1 in 4 = Universal Closed Ends
15.02LWS	Light Weight Structural Three Quarter	290x190x140	8.7	128	120 minutes	(ƒ’uc ≥ 15MPa)
15.03LWS	Light Weight Structural Half	190x190x140	6	192	120 minutes	(ƒ’uc ≥ 15MPa)
15.22LWS	Light Weight Structural Seven Eighths	340x190x140	10.6	108	120 minutes	(ƒ’uc ≥ 15MPa)
15.401FR	Fire Rated Reduced Core	390x190x140	15.9	120	240 minutes	(ƒ’uc > 8MPa)

200 Series

Product Code	Product Name	Dimensions	Weight per unit (kg)	Units per pallet	Fire Rating	MPA	Notes
20.42UNV	Channel	390x190x190	14.3	108	60 minutes	(ƒ’uc ≥ 15MPa)
20.02AG	Three Quarters	290x190x190	13.4	96	60 minutes	(ƒ’uc ≥ 15MPa)
20.03AG	Half	190x190x190	8.6	144	60 minutes	(ƒ’uc ≥ 15MPa)
20.01AG	Standard	390x190x190	15.9	90	60 minutes	(ƒ’uc ≥ 15MPa)
20.71AG	Standard Half Height	390x90x190	7.3	162	60 minutes	(ƒ’uc ≥ 15MPa)
50.31AG	190x390 Capping Tile	390x40x190	6.7	216
20.12AG	Lintel Bond Beam	390x190x190	22.6	72	60 minutes	(ƒ’uc ≥ 15MPa)
20.48AG	H Block	390x190x190	14.2	90	60 minutes	(ƒ’uc ≥ 15MPa)
20.20LWS	Light Weight Structural	390x190x190	12.0	108	120 minutes	(ƒ’uc ≥ 15MPa)	1 in 3 blocks are Universal 2 Closed Ends
20.02LWS	Light Weight Structural Three Quarter	290x190x190	12.2	96	120 minutes	(ƒ’uc ≥ 15MPa)
20.03LWS	Light Weight Structural Half Length	190x190x190	7.6	144	120 minutes	(ƒ’uc ≥ 15MPa)
20.401FR	Fire Rated Standard Hollow	390x190x190	14.9	90	240 minutes	(ƒ’uc ≥ 8MPa)

300 Series

Product Code	Product Name	Dimensions	Weight per unit (kg)	Units per pallet	Fire Rating	MPA
30.48AG	H Block	390x190x290	20.4	72		(ƒ’uc ≥ 15MPa)
20.02AG	Half and End	390x190x290	13.4	96		(ƒ’uc ≥ 15MPa)
10.32FR	End Closer / Capping	290x190x90	10.2	192	60 minutes	(ƒ’uc ≥ 8MPa)
30.01AG	Standard	390x190x290	21.0	72		(ƒ’uc ≥ 15MPa)

Concrete Brick

Website Image	Product Code	Product Name	Dimensions	Weight per unit (kg)	Units per pallet	Fire Rating	MPA	Notes
	Corecast Brick	Corecast Brick	230x110x76	3.3	500	90 minutes	(ƒ’uc ≥ 10MPa)	1 in 7 is solid Sold in Full Pallets Make Up Fee for Part Pallets
	QB	Quick Brick	230x110x162	6.8	250	90 minutes	(ƒ’uc ≥ 4MPa)	Sold in Full Pallets Make Up Fee for Part Pallets