Project Portfolio

This 19-story student housing high rise in downtown Philadelphia is home to 802 student beds.  There is ground floor retail space and parking.  Level 2 is home to intermediate amenity space as well as a roof deck on level 14 including a pool. The building is conveniently located to serve both University of Pennsylvania and Drexel University.

• 5-on-1 podium
• Post-tensioned concrete podium
• 130,000 GSF

11 E Lenox is a 7-story, multifamily residential project in Boston, MA. Completed in the winter of 2022, it was the first ground-up mass timber building in the City of Boston and was the tallest mass timber building in the Northeast at the time of completion.

• Glulam columns and double-beams support 5-ply cross laminated timber floor slabs.
• 7-story mass timber eliminated the need for a podium
• Cost neutral with 5-on-2 podium
• Double-beams run parallel with unit demising walls. No beams span the other direction – creating a lot of advantages, including beam free corridors for MEP runs.
• Fully exposed mass timber – fire rating comes from char
• Lateral system  – Redi cores

Considering mass timber, or just want to learn more?

Contact us today for our free multifamily mass timber design guide.

45,000 SF, 3-story, LEED Platinum life science development with below grade parking.  The below grade construction utilizes secant pile construction as temporary support of excavation and permanent basement walls and water cutoff.  Above grade construction is composite steel construction designed to meet 2,000-8,000 micro-inches per second (mips) depending on tenant requirement.

200,000 GSF, 5-story multifamily residential development.

• Type IIIA construction
• Significant sloped site
• Leveraged the slope site to create amenity space on the lowest street elevation without exceeding the the 5-story height limit of Type IIIA wood construction.

Rendering by Port One Companies

3-story 210,000 SF composite steel medical office building with 3 levels of below grade parking. Ground floor consists of an Ambulatory Service Center with two stories of office space above and elevated courtyard spaces.

Rendering courtesy of Machado Silvetti.

The Beck includes the new construction of a five-story, 360,000 sf building on the riverfront in Haverhill, MA. Located on what was formerly a vacant factory site by Bradford’s Commuter Rail station, this 5-on-1 podium has below grade parking, amenity and retail at level 1, and residential market rate apartments at Level 2-Roof.  The building will house 290-units of residential market-rate apartments, and ground floor retail space totaling 6,750 SF. Construction will also include the creation of 320 parking spaces for residents and public parking spaces for retail stores and restaurants.

Rendering by CUBE3

H+O provided Engineer of Record services alongside a design-build effort with Imperatore and Star Building.

• Fast-track design and construction schedule
• Early foundation package
• Navigate lateral loads and construction sequencing with 16′-0″ retaining wall cutting through the building.

Interested in a design-build project with engineers who understand logistics and construction cost?

Contact us today.

This two-building cGMP Advanced Manufacturing Campus consists of 294,000 SF (147,000 SF per building), 40-foot building heights and expansive internal mezzanines. 44 Middlesex is a purpose-built, life science manufacturing campus buildings designed to satisfy the needs of life science manufacturing tenants with high rooftop MEP demands, interior clean room demands, and future mezzanine and loading bay expansions.

Construction:

• Roof – Long-span steel roof joists with 40ft clear heights
• Mezzanine – composite steel designed for 8,000 mips
• Exterior walls – steel column & girt system

Many spec-built cGMP manufacturing facilities are designed with an overly-conservative and costly amount of future potential mechanical loads on the roof.  Not at 44 Middlesex. H+O and the team studied the distribution of potential mechanical loads over the 105k GSF roof to determine appropriate loading and avoid spending unnecessary money.

Rendering by TRIA

13-story, high-rise hotel on Hamilton Place, steps from the Boston Common. The 80-key hotel will feature an open-air roof deck with views of the Boston Commons, amenity space, bike storage, and a ground level café.

• Conceptual design studies explored mass timber, steel, concrete and light gage.
• Revitalize the existing 3-story sandstone and brick façade.
• Design considers logistics and site constraints including zero lot lines and limited access to site on Hamilton Place.
• Concrete cast-in-place structure with a concrete core.

Renderings by RODE Architects.

Conceptual design studies play a critical role in high rise developments. Contact us today to make sure you select the right structural system for your next development.

Phase I of II, this multifamily residential development will deliver 469-units to Dorchester. Each structure includes two exterior courtyards and two-story tall, clear-span entries to the garage. This development is transit oriented with ocean and city views.

250 unit mixed-use residential development with 250,000 of framed floor/roof area. Consists of 5 levels of type IIIA wood construction over a Type 1A composite steel podium with a central courtyard space. The structure is supported by a mix ground improvement using rammed aggregate piers and rigid inclusions.

Repositioning this 120+ year-old brick and heavy timber building for life science use.

• Updated the lateral system using shotcrete shear walls, a creative and cost-effective means to increase the lateral capacity of unreinforced brick shear walls.
• Added 2″ concrete topping slab to the existing heavy timber floor to increase floor vibration performance for lab use.
• Foundation upgrades using drilled mini piles and grade beams to supplement the existing timber pile supported foundation.

H+O conducted a feasibility study to quantify the magnitude of structural upgrades prior to a full design so the owner could make informed decisions during their due diligence period.

Considering repositioning an existing building?

Not all buildings are created equal – schedule a meeting through our contact page to better spot risk and opportunity when acquiring existing assets.

Two new construction student housing development with dorm living on the upper levels and classrooms and flex space on the ground floor.  The project will deliver 540 new beds to the campus over about 140,000 sf of new construction.

A 3-building development consisting of 293 residential units (15% affordable) over parking. Buildings A and B are 3 stories of Type VA wood construction over a 2-story Type IA composite steel podium with 22,670 SF of retail space on level 1 and below grade parking. Building C consists of 4 stories of Type VA wood construction supported by a 1-story composite steel podium over below grade parking.

80,000 SF high-bay manufacturing expansion for a growing tenant.

• Stepped the roof to avoid adding snow drift on the existing building
• Transferred roof diaphragm loads through the step in the roof without adding interior braced frames
• Vertical insulated metal panel walls

Ground-up multifamily development with 250 new rental apartments, below-grade parking, and retail space along the street corridor.  A 4-on-1 structure with with a Type IA composite steel podium supporting 4 levels of Type VA panelized wood construction.

50 Leo provides 49 new condominium homes for the growing Allston Brighton Neighborhood. A 1-story composite steel podium support 5 levels of type IIIA panelized wood construction.

Located in front of the Cathedral of the Holy Cross, 1395 Washington is a 6-floor, high-end condo in the heart of South End.

• 5-on-1 podium structure
• Tight urban infill with zero lot line

Renderings by EMBARC

This design team delivered an expansive exterior roof deck and rooftop greenhouse with 360-degree city views. A challenging addition to the existing structure:

• Steel column pierce through the existing concrete roof structure to new & existing pile-supported foundations.
• A composite steel transfer frame to support the new greenhouse to avoid overloading the existing roof structure.
• Seismic upgrade using select exterior CMU walls
• Conceptual design study confirmed project could be completed within budget.

Images courtesy of RODE Architects

New 12-story student housing development with ground floor retail and 3 levels of below-grade parking located in State Park, PA.  Project will deliver 473 beds.

Lead by Shake Shack and Bergmeyer, the Danbury location set the standard for new locations, perfecting the drive-up process for visitors.

As a trusted partner to Bergmeyer and Shake Shack, H+O has helped deliver dozens of Shake Shack locations across the country.

Photos courtesy of Bergmeyer.

This nine-story transit-oriented development will bring 105 market-rate apartments plus ground-floor retail to Worcester’s Canal Park.

Rendering by RODE Architects.

New ski lodge for Tenney Mountain Ski Resort in Plymouth, New Hampshire. This brand new state-of-the-art ski lodge will feature a 10,000 sf wraparound deck with 360-degree views of the mountain, a double-sided fireplace, and plenty of room for lounging year-round at the upstairs bar & restaurant. Construction will be a blend of structural steel and exposed mass timber (glulam beams and columns and CLT decks.

4-story affordable housing development located in the heart of Hyannis, MA. Project to deliver 120 new affordable apartments to the area.

A 4-building mixed-use, multifamily residential development amassing to 350,000 GSF.  The project will deliver 415-units to the historic downtown.

• 4-on-1 podium: 4 levels of type VA wood construction supported by a composite steel podium.
• Pile-supported foundations and structural slabs to accommodate soils unsuitable to support a building.
• (15) 3-story townhouses

Renderings by EMBARC.

95,000 sf expansion of Vicor’s existing manufacturing space in Andover, MA.  Vicor Corporation is a leading global high-performance power company focused on developing high-density power modules, and the expansion creates the world’s first ChiP (Converter housed in Package) fabrication facility, or “ChiP fab,” which sets the standard for scalable high-volume, cost-effective and reliable power module manufacturing in the United States.  The ChiP fab enables innovative power solutions that deliver compact and highly efficient modular power units for a wide array of fields, including data center, automotive, aerospace/satellite, robotics and unmanned aerial vehicles, to name few.

A major design requirements of the 2-story expansion was meeting strict vibration criteria, exceeding 2000 mips over the full floor plate.

Photos by GRLA

7-story, 68,000 SF tower with 43 residential units, a two level restaurant, and below-grade parking to this bustling urban infill site in Quincy, MA. The building is planned to use mass timber construction with CLT floors, glulam beams and columns, and concrete cores for lateral support.

New single-story, high-bay warehouse structure totaling 135,000sf. The roof of the structure consists of long-span steel roof joists supported by interior steel columns and perimeter precast concrete wall panels. The structure is supported by ground improvement using rigid inclusions. Notable challenges – Integration of the precast wall panels with the building foundation. The uneven grade at a corner of the building created a soil retaining condition which required different retaining wall heights and designs.