Project Type: Evaluation, Design, Bid Assistance and Construction Administration

The Vital Structure: 

Davit Crane Base Modifications

Issue

During a roof replacement project, it was found that numerous anchor rods securing steel davit baseplates to the roof structure were defective. The bases are used to secure a davit crane and platform for window washing. The davit assembly base must be engineered to resist ultimate limit loads of 4,600 lb (axial) and 29,900 ft-lb (moment).

base modifications for project
load testing for Davit System Certification

Diagnosis

When anchor rod nuts were attempted to be loosened for removal of the davits for roofing purposes, Vital Structures and the fall protection contractor observed that the rods were rotating inside the concrete pier. Vital Structures concluded that the davit bases should be removed, and a new structural attachment of the bases to the roof structure should be designed and implemented.

 

 

 

Solution

Vital Structures visited the site with a Ground-Penetrating Radar (GPR) professional to locate reinforcing steel inside of the concrete piers. The schematic rebar layout was used to develop an approach of anchoring into the piers from the side, using a steel “cap” dropped over the pier, and design documents were prepared. Competitive bids were solicited for the project, and a thorough shop drawing preparation and review process was undertaken due to the varying reinforcing steel layouts in each of the eighteen (18) total davit bases. Vital Structures also provided engineering oversight of load testing and certification of the (44) davit bases on the building.

schematic rendering of proposed steel cap assembly

Evaluate. Guide. Revitalize.

Let's Do Something Vital Together!

“An Objective Expert We Could Trust”

We retained Vital Structures after finding our builder unwilling to help identify and rectify obvious bowing and waving to our accessory building.  The information provided by Vital was impressive as it was detailed and specific calling out nonconformance to building codes, industry standard construction practices and manufacturer specifications.  The reports were written in a way that was observational, with pictures and evidence.  Had we not hired an objective expert we would have been faced with serious structural problems unknown to layman.  The professionalism, expectation setting and follow-through on Vital Structures part was the due diligence we needed to protect ourselves in this endeavor.  It is well worth the time and expense to correct the issues in advance of accepting subpar construction.

Jeanne Pagani

Homeowner

“Vital Structures Has My Highest Recommendation.”

As the trustee for the Lois J. Lewis Trust, I contracted Vital Structures to oversee a project to evaluate and repair the foundation pilings of an 1880s lakefront cabin on Spofford Lake. The cabin’s piling foundations had deteriorated due to hillside erosion, age, and lack of maintenance. By the time Vital Structures took on our project, the foundation was close to failure.

David Morand, who oversaw the project, was professional, meticulous, and flexible,- offering several well-considered solutions to our problem. He and his team were involved from start to finish, readily available for updates, and on site to address any issues that arose. David was also instrumental in connecting us with a contractor who could meet our unique needs, given the limited access and difficult site conditions.

I can’t say enough good things about the way Vital Structures conducted the project and their professionalism throughout the process. They were a pleasure to work with.

Kenneth Betts

Trustee, The Lois J. Lewis Trust

“Vital provided invaluable assistance and made our buildings healthy again!”

Our Association hired Vital Structures to inspect our decks. David, Richard, and the rest of their team are very professional, knowledgeable, and easy to work with. As our relationship formed, Vital Structures became our Engineers of choice to develop a new design to replace all the decks in the Association.  Vital provided us with invaluable assistance in obtaining Contracting Bids, so we had verifiable Construction Company choices.  Once renovation began, Vital oversaw the project, holding Contractors accountable, ensuring construction was completed to our new design specifications and that the job was done correctly.  Everyone loves the new look and our buildings are becoming healthy again!

Mike Labrecque

Trustee, The Colonial Village

“A huge value to our business!”

We are a waterfront business operating in Provincetown for over fifty years. Vital Structures has been our valued “go-to” partner whenever we address issues relative to our building or property. Their comprehensive knowledge and ability to assess issues and provide solutions across the board is truly a unique expertise and of huge value to businesses like ours. They are service-oriented, extremely responsive, and know their business – and ours. Five-star excellence in all regards!

 

Jill Botway

Managing Director, The Boat Slip LLC

“Highly Recommended! “

Vital Structures llc has proven to be a top notch engineering firm. Beginning with a comprehensive and thorough review of the job scope, to the completion of a project with no details missed. All personnel involved with each project we have found to be excellent to work with and yet never willing to compromise details that would have any adverse effect on the project. Whenever unforeseen conditions arise, they are immediately back to the drawing board without any hesitation in order to keep the project moving. I would highly recommend Vital Structures llc for any structural or building envelope projects.

Brett Emery

Emery Construction LLC

“An Eye for Detail”

We have been working with David Morand of Vital Structures on a few different projects over the years.  We are completely impressed as he is professional, has an eye for detail, is very thorough, and always answers all our questions.  David & the Vital Structure’s team are very knowledgeable about the industry, very proactive with their approach, and always do a great job.  I would not hesitate to use David and his team on the future projects.

Laurie Ferrari

CEO, Peters Property Management
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