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SIGMA is pleased to advise the availability of a new aluminum product line to support the national Precast market. Effective immediately, SIGMA will be offering a series of domestically manufactured Aluminum Access Hatches for construction companies building concrete utility vaults.

The access hatches come in two designs; as an angled frame and as a trough frame.

  • The angled frame is designed for applications where rainwater entering the vault is not a concern and is available as a single or double leaf.
  • The trough frame is suited for applications where rainwater intrusion control is needed and is also available single or double leaf.
  • Optional safety grates and nets available upon request for all hatches

Both products meet the American Association of State Highway Transportation Officials (AASHTO H-20) standard for manhole frame and cover load bearing requirements for pedestrians and vehicles in low traffic areas.

SIGMA can manufacture various types of aluminum frame styles and sizes, from standard sizes such as 24×24 to 60×60 inches, to custom orders.  We are also now offering Aluminum Ladders to complement the new Hatch line.

For further information, please email SIGMA’s Precast team Glenn Chaisson gc1@sigmaco.com or Harry Bair hb1@sigmaco.com or cell 850 206 7675.