To become authorized producers of EnerBlock concrete masonry units, firms must agree to produce them to standards equivalent to ASTM C90: Standard Specification for Load-Bearing Concrete Masonry Units (current edition).

Structural tests by an independent testing laboratory* confirm that EnerBlock concrete masonry units comply with equivalent structural capability requirements of ASTM C90.** These tests confirm that:

(1) Compressive strengths of tested EnerBlock units meet the load bearing compressive strength requirements of ASTM C90.

(2) Flexural strengths of 4 ft. x 8 ft. test walls of EnerBlock lightweight concrete masonry units exceeded the flexural strength of walls of regular normal weight concrete block meeting ASTM C90 equivalent web requirements.

* Test reports available on request, from West Materials.

** The unique EnerBlock Web design does not conform to ASTM C90-00 equivalent web thickness schedule in Table 1. However, Paragraph 5.3.1 (note 4) provides for compliance when equivalent structural capability is established by applicable tests and appropriate design criteria developed in accordance with applicable building codes.

EnerBlock concrete masonry units accept grout and reinforcing steel vertically and horizontally without losing continuity of insulation. There are no cold spots common to walls insulated with loose fills or foamed-in-place insulation.

Note that web spacing and cores of EnerBlock concrete masonry units are designed so that cores always align vertically for easy grouting in either stacked or running bond.

EnerBlock concrete masonry units meet structural design requirements (bending moment and shear) of building codes for reinforced masonry.