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Aluminum Dome

HMT's clear span Aluminum Domes and Flat Panel Covers are custom engineered to accommodate a wide range of shapes, spans and operating service conditions.  HMT's Aluminum Domes are designed in full accordance with the latest revision of AWWA D100 or API 650, Appendix G.  Applications include water storage, wastewater treatment, clarifiers and thickeners as well as bulk storage.

HMT's state of the art design program fully integrates three dimensional graphic design with finite element analysis, generating in real time customer drawings, CNC fabrication drawings, structural analysis, reports and bill of materials.

The HMT Aluminum Dome cover features a clear span all aluminum constructed, light weight corrosion resistant structure.  HMT’s exceptionally strong clear span design eliminates the need for interior support structures which eliminate floating roof penetration and reduce vapor emissions. 

Eccentric loads provide a challenging environment for dome covers. Design elements of the HMT Geodesic Aluminum Dome such as the unique double web beam design and overlapping panels give this design a very high strength to weight ratio, allowing the maximum flexibility and ensuring structural integrity.

All seams are designed with primary and secondary seal mechanisms. The utilization of the HMT Aluminum Dome cover will eliminate rain water infiltration into the stored product, most wind induced vapor losses, environmental attacks on the floating roof seals, roof coatings and the floating roof.

Panels on the HMT Aluminum Dome cover achieve superior wind and leak resistance through the use of a unique batten bar and hidden gasket system instead of the more traditional clamped system with exposed gaskets.

Let HMT put our three decades of experience in the design, manufacture, supply and installation of aluminum structures to work for you today.

Advanced features of Aluminum Dome cover include the following:

• The Clear Span design eliminates the need for interior support structures while high strength aluminum alloys and corrosion resistant materials provide for a long service life.

• A tension ring is standard on all HMT Aluminum Domes. Properly designed tension rings ensure that the lateral force generated by the dome is not translated to the tank shell, eliminating the need for additional tank shell reinforcement or modifications.

• The structural members of HMT’s Geodesic Dome are of a double web design, providing a higher strength to weigh ratio than a standard I- beam.

• Beams are designed with an extruded continuous threaded bolting slot as in HMT’s patented Aluminator™ aluminum floating roof.  This bolting slot provides more thread engagement area and more pull resistance than in conventional designs.

• A dedicated geodesic dome engineering group utilizes state of the art design programs to uniquely customize each HMT Dome to it’s particular application. Panel layouts and finite element analysis for all design cases are performed on each dome.

• HMT’s unique overlapping panel design prevents leaking. The overlapping panels naturally shed water and are secured in place with a patented Batten Bar and hidden gasket system. This deign allows the roof panels to flex while keeping sheets from puckering and bolts from leaking.

• The HMT Aluminum Dome reduces  wind induced vapor losses, aids in odor abatement and provides significant emission credits.

• The HMT Aluminum Dome cover requires minimum maintenance.  All components are resistant to UV and ozone degradation.  There are never any coatings to apply or reapply.

• Floating roof and seal maintenance are drastically reduced due to the lack of rainwater and UV exposure.

• A complete line of accessories are available including skylights, patches, doors, dormers, vents, etc.

• Installation is performed by experienced HMT personnel.  Tanks can even remain in-service during installation.