Convert Your Project Contingency Into Margin
De-Risk Complex Facade Installation and Eliminate Rework
SumPoint is a design for fabrication and installation consultant. We deliver complex projects — identifying and eliminating constructibility problems before they impact project quality, schedule, and budget.


Constructibility Design Assist

  • Eliminate re-design during bidding and shop drawings
  • Reduce design risk by identifying tolerance stacks and clashes before a single part is made
  • Solve constructibility issues that occur between adjacent and uncoodinated trades
Design-for-fabrication and installation support for Architects and Construction Managers through Design Development and Construction Documentation

Model Directed Installation

  • Eliminate re-work caused by out-of-tolerance substrates and clashing assemblies
  • Drastically reduce installation cycle times by setting parts right the first time
  • Increase worker safety by pre-setting parts on the ground before they're picked
  • Expand site-work visibility via real-time updates to mobile devices (coming soon)

Precise part placement for Sub-Contractors and Self-Perform General Contractors during mobilization and installation


Google Headquarters: Bayview

During the design phase, comprehensive 3D modelling and analysis of tolerance and deflection was performed at critical interfaces between multiple trades. Premobilization, survey and point cloud scans were evaluated and 3d models reconciled to fit as-built conditions. Field support was provided for the installation of composite clerestory glazing (Benson Mitek) with stainless steel eyebrow overhangs (Zahner) as well as the stainless steel perimeter bullnose assemblies that wrapped the roof edge and supported the perimeter gutter.

We incorporated the canopy deflection criteria in our evaluation of survey information (translations in X,Y,Z as the building was loaded with more weight) to predict where our final position would be and respond appropriately. Once analysis was complete and positional data calculated, a spreadsheet of elevation values via jackbolt heights/unique shim packs was exported and sent to the field crews. This offered the installers the ability to set the positions of all the units while safe on the ground with assurance that prefabricated parts would align once the building was fully loaded.
Location: Mountain View, CA
Year Completed: 2022
Clients: Whiting Turner
Coordinated Trades: 10+
Part Count: 5k
Square Footage Installed: 100k (3 buildings)
*Work completed while with A Zahner Company. Photo credit J. Coleman.

Scottsdale Civic Center 360° Canopy

The canopy is composed of a sinusoidal tubular steel spine with cantilevering mullions and prefabricated freeform patterned skins. The low tolerance of the steel superstructure created difficult conditions on which to install the high tolerance finished skin components, so a digital twin model was created from as-built scans and fabricator models. Reconciling the two allowed for adjustments to part orientations, created consistent edges and reveals, and assured that parts would fit before they arrived on site. The model was used to drive a directed survey installation in the field, which was complemented by a custom magnetic fixture to coordinate the relationship between prism and weld stud positions. The combination of as-built analysis, 3d model reconciliation, and on-site directed survey enabled an expedited installation not achievable using conventional methods.
Location: Scottsdale, AZ
Year Completed: 2023
Client: Willmeng Construction
Part Count: 500
Square Footage Installed: 5k
*Work completed while with A Zahner Company. Photo credit J. Coleman.
The sculpture is composed of 225 laser cut aluminum 'leaves'; each requiring precise positioning on an existing 150’ tall cast-in-place concrete wall. Although the substrate appears flat, it deviated +/- 1.75” from the as-designed directives, resulting in challenges achieving an accurate layout. A digital-twin model defining 687 precise mounting anchor locations was produced from a jobsite scan. Each anchor point was modeled, named, and coordinated with both PENZID ASCII formatted points for the total station operator and physical stickers for quick reference by the installers. Directed survey was used to quickly guide the site team to drill locations for each anchor at the pre-determined locations.
Location: Charlotte, NC
Year Completed: 2023
Client: Nervous System, RafCo Properties
Coordinated Trades: 2
Part Count: 1k
Square Footage Installed: 4k
*Work completed while with A Zahner Company. Photo credit J. Coleman.

Xylem Arbor Sculpture


James Coleman
James is co-founder of SumPoint. He brings a unique mix of design, engineering, construction, and digital fabrication expertise. His work focuses on the comprehensive process of delivering extraordinary architectural projects; leveraging parametric design-to-fabrication-to-installation workflows.

Previously, James was Vice President - Innovation R&D at Zahner, a company that specializes in computational fabrication at an architectural scale. As a part of the Executive Team, James led research initiatives and provided strategic support on large scale and complex projects.

He has worked as a Design Engineer with award winning architecture firms around the world and as a Product Development Engineer at Ford Motor Company James holds a Master of Architecture and Master of Science in Mechanical Engineering from the Massachusetts Institute of Technology and a Bachelor of Environmental Design from the University of Colorado-Boulder.
Andrew Manto
Andrew is co-founder of SumPoint. He's a problem solving technologist – trained as an Architect, he takes on complex design challenges by collaborating across disciplines, working from micro to macro, and building interesting and impactful spaces that make the world a better place. 

Formerly, Andrew was Associate Director of Fabrication Architecture at Sidewalk Labs/Google where he led the DFMA prototyping of a mass timber kit-of-building-parts composed of facade, floor, and structural elements.

He was an Advanced Manufacturing Engineer at Zahner, where he developed custom fabrication processes, implemented bespoke software and hardware tools, and created online platforms for the specification of unique facade components. He holds a Master of Architecture from the Massachusetts Institute of Technology and a Bachelor of Science in Architectural Studies from the University of Wisconsin-Milwaukee.


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Discuss how SumPoint expertise can add value to your project. We work across project typologies, scales, materials, locations, complexities, and budgets.