.webp)
Public Works Inspection & Testing Services
Ensure adherence to industry standards with quality assurance programs for construction
With California’s ever-changing fiscal situation, aging infrastructure, and continued urban growth, our cities and counties are faced with unique challenges. It’s crucial for public agencies to stretch their dollars spent to maximize the community’s investment. Our Construction Quality Assurance Programs are used by numerous agencies throughout the state and emphasize the most cost-effective practices.
We are uniquely positioned to provide quality assurance programs for construction projects from start to finish. Through our partnerships with Caltrans and various research institutes, we have knowledge of proven technological advances in construction that we can pass on to our clients and incorporate into their projects as appropriate. We routinely contribute to the American Public Works Association by presenting technical sessions related to some of the newest technological advances. Whether it involves rapid-strength concrete, warm mix asphalt, high-volume fly ash mixes to reduce greenhouse gases, or 100% recycled materials, Twining can provide the proper solution for your project.
Whether it is a major water/wastewater project, bridge and roadway improvement, underground utility work, or airport improvement project, our team possesses the requisite expertise and capabilities to effectively establish and maintain a quality assurance program that is in strict compliance with the local assistance procedures manual as well as state and federal mandates.
Twining employs project managers and registered civil and geotechnical engineers, all experienced in public works quality assurance. Each engineer is fully responsible for the project that they manage, which creates a seamless flow of engineering recommendations, inspection reports, and laboratory reports. We maintain a project management approach that utilizes electronic inspection reporting where possible and appropriate.
Our team of engineers and project managers is supported by a deep roster of field inspectors who practice a proactive inspection approach. This means that they are arriving at the site prepared, providing proper documentation, and communicating frequently with the project management and project stakeholders. Our inspectors understand what is expected of our clients. When a non-compliance issue has been determined to exist, it is communicated to the project team from the moment of occurrence until it is reconciled.
Public Works Inspection & Testing Services
Public Works Inspection & Testing Services
Ensure adherence to industry standards with quality assurance programs for construction
With California’s ever-changing fiscal situation, aging infrastructure, and continued urban growth, our cities and counties are faced with unique challenges. It’s crucial for public agencies to stretch their dollars spent to maximize the community’s investment. Our Construction Quality Assurance Programs are used by numerous agencies throughout the state and emphasize the most cost-effective practices.
We are uniquely positioned to provide quality assurance programs for construction projects from start to finish. Through our partnerships with Caltrans and various research institutes, we have knowledge of proven technological advances in construction that we can pass on to our clients and incorporate into their projects as appropriate. We routinely contribute to the American Public Works Association by presenting technical sessions related to some of the newest technological advances. Whether it involves rapid-strength concrete, warm mix asphalt, high-volume fly ash mixes to reduce greenhouse gases, or 100% recycled materials, Twining can provide the proper solution for your project.
Whether it is a major water/wastewater project, bridge and roadway improvement, underground utility work, or airport improvement project, our team possesses the requisite expertise and capabilities to effectively establish and maintain a quality assurance program that is in strict compliance with the local assistance procedures manual as well as state and federal mandates.
Twining employs project managers and registered civil and geotechnical engineers, all experienced in public works quality assurance. Each engineer is fully responsible for the project that they manage, which creates a seamless flow of engineering recommendations, inspection reports, and laboratory reports. We maintain a project management approach that utilizes electronic inspection reporting where possible and appropriate.
Our team of engineers and project managers is supported by a deep roster of field inspectors who practice a proactive inspection approach. This means that they are arriving at the site prepared, providing proper documentation, and communicating frequently with the project management and project stakeholders. Our inspectors understand what is expected of our clients. When a non-compliance issue has been determined to exist, it is communicated to the project team from the moment of occurrence until it is reconciled.
With California’s ever-changing fiscal situation, aging infrastructure, and continued urban growth, our cities and counties are faced with unique challenges. It’s crucial for public agencies to stretch their dollars spent to maximize the community’s investment. Our Construction Quality Assurance Programs are used by numerous agencies throughout the state and emphasize the most cost-effective practices.
We are uniquely positioned to provide quality assurance programs for construction projects from start to finish. Through our partnerships with Caltrans and various research institutes, we have knowledge of proven technological advances in construction that we can pass on to our clients and incorporate into their projects as appropriate. We routinely contribute to the American Public Works Association by presenting technical sessions related to some of the newest technological advances. Whether it involves rapid-strength concrete, warm mix asphalt, high-volume fly ash mixes to reduce greenhouse gases, or 100% recycled materials, Twining can provide the proper solution for your project.
Whether it is a major water/wastewater project, bridge and roadway improvement, underground utility work, or airport improvement project, our team possesses the requisite expertise and capabilities to effectively establish and maintain a quality assurance program that is in strict compliance with the local assistance procedures manual as well as state and federal mandates.
Twining employs project managers and registered civil and geotechnical engineers, all experienced in public works quality assurance. Each engineer is fully responsible for the project that they manage, which creates a seamless flow of engineering recommendations, inspection reports, and laboratory reports. We maintain a project management approach that utilizes electronic inspection reporting where possible and appropriate.
Our team of engineers and project managers is supported by a deep roster of field inspectors who practice a proactive inspection approach. This means that they are arriving at the site prepared, providing proper documentation, and communicating frequently with the project management and project stakeholders. Our inspectors understand what is expected of our clients. When a non-compliance issue has been determined to exist, it is communicated to the project team from the moment of occurrence until it is reconciled.
With California’s ever-changing fiscal situation, aging infrastructure, and continued urban growth, our cities and counties are faced with unique challenges. It’s crucial for public agencies to stretch their dollars spent to maximize the community’s investment. Our Construction Quality Assurance Programs are used by numerous agencies throughout the state and emphasize the most cost-effective practices.
We are uniquely positioned to provide quality assurance programs for construction projects from start to finish. Through our partnerships with Caltrans and various research institutes, we have knowledge of proven technological advances in construction that we can pass on to our clients and incorporate into their projects as appropriate. We routinely contribute to the American Public Works Association by presenting technical sessions related to some of the newest technological advances. Whether it involves rapid-strength concrete, warm mix asphalt, high-volume fly ash mixes to reduce greenhouse gases, or 100% recycled materials, Twining can provide the proper solution for your project.
Whether it is a major water/wastewater project, bridge and roadway improvement, underground utility work, or airport improvement project, our team possesses the requisite expertise and capabilities to effectively establish and maintain a quality assurance program that is in strict compliance with the local assistance procedures manual as well as state and federal mandates.
Twining employs project managers and registered civil and geotechnical engineers, all experienced in public works quality assurance. Each engineer is fully responsible for the project that they manage, which creates a seamless flow of engineering recommendations, inspection reports, and laboratory reports. We maintain a project management approach that utilizes electronic inspection reporting where possible and appropriate.
Our team of engineers and project managers is supported by a deep roster of field inspectors who practice a proactive inspection approach. This means that they are arriving at the site prepared, providing proper documentation, and communicating frequently with the project management and project stakeholders. Our inspectors understand what is expected of our clients. When a non-compliance issue has been determined to exist, it is communicated to the project team from the moment of occurrence until it is reconciled.
We Use The Following Techniques
With California’s ever-changing fiscal situation, aging infrastructure, and continued urban growth, our cities and counties are faced with unique challenges. It’s crucial for public agencies to stretch their dollars spent to maximize the community’s investment. Our Construction Quality Assurance Programs are used by numerous agencies throughout the state and emphasize the most cost-effective practices.
We are uniquely positioned to provide quality assurance programs for construction projects from start to finish. Through our partnerships with Caltrans and various research institutes, we have knowledge of proven technological advances in construction that we can pass on to our clients and incorporate into their projects as appropriate. We routinely contribute to the American Public Works Association by presenting technical sessions related to some of the newest technological advances. Whether it involves rapid-strength concrete, warm mix asphalt, high-volume fly ash mixes to reduce greenhouse gases, or 100% recycled materials, Twining can provide the proper solution for your project.
Whether it is a major water/wastewater project, bridge and roadway improvement, underground utility work, or airport improvement project, our team possesses the requisite expertise and capabilities to effectively establish and maintain a quality assurance program that is in strict compliance with the local assistance procedures manual as well as state and federal mandates.
Twining employs project managers and registered civil and geotechnical engineers, all experienced in public works quality assurance. Each engineer is fully responsible for the project that they manage, which creates a seamless flow of engineering recommendations, inspection reports, and laboratory reports. We maintain a project management approach that utilizes electronic inspection reporting where possible and appropriate.
Our team of engineers and project managers is supported by a deep roster of field inspectors who practice a proactive inspection approach. This means that they are arriving at the site prepared, providing proper documentation, and communicating frequently with the project management and project stakeholders. Our inspectors understand what is expected of our clients. When a non-compliance issue has been determined to exist, it is communicated to the project team from the moment of occurrence until it is reconciled.
With California’s ever-changing fiscal situation, aging infrastructure, and continued urban growth, our cities and counties are faced with unique challenges. It’s crucial for public agencies to stretch their dollars spent to maximize the community’s investment. Our Construction Quality Assurance Programs are used by numerous agencies throughout the state and emphasize the most cost-effective practices.
We are uniquely positioned to provide quality assurance programs for construction projects from start to finish. Through our partnerships with Caltrans and various research institutes, we have knowledge of proven technological advances in construction that we can pass on to our clients and incorporate into their projects as appropriate. We routinely contribute to the American Public Works Association by presenting technical sessions related to some of the newest technological advances. Whether it involves rapid-strength concrete, warm mix asphalt, high-volume fly ash mixes to reduce greenhouse gases, or 100% recycled materials, Twining can provide the proper solution for your project.
Whether it is a major water/wastewater project, bridge and roadway improvement, underground utility work, or airport improvement project, our team possesses the requisite expertise and capabilities to effectively establish and maintain a quality assurance program that is in strict compliance with the local assistance procedures manual as well as state and federal mandates.
Twining employs project managers and registered civil and geotechnical engineers, all experienced in public works quality assurance. Each engineer is fully responsible for the project that they manage, which creates a seamless flow of engineering recommendations, inspection reports, and laboratory reports. We maintain a project management approach that utilizes electronic inspection reporting where possible and appropriate.
Our team of engineers and project managers is supported by a deep roster of field inspectors who practice a proactive inspection approach. This means that they are arriving at the site prepared, providing proper documentation, and communicating frequently with the project management and project stakeholders. Our inspectors understand what is expected of our clients. When a non-compliance issue has been determined to exist, it is communicated to the project team from the moment of occurrence until it is reconciled.
Petrographic examination of concrete and cementitious materials (ASTM C856) including visual examination of specimens in as-received condition, stereomicroscopy of polished cross-sectional surfaces, thin section analysis using fluorescence microscopy, and phenolphthalein staining to characterize the composition and condition as well as causes of deterioration or distress in submitted samples,
Scanning electron microscopy with energy dispersive x-ray spectrometry (SEM/EDS) analysis (ASTM C1723) for elemental composition of concrete, cementitious materials, aggregate and secondary deposits,
Chloride analysis to measure acid-soluble chloride content (ASTM C1152) or water-soluble chloride content (ASTM C1218) within a material to evaluate for corrosion potential and external chloride exposure,
Hardened air void system analysis (ASTM C457) to evaluate for total air content and air void system parameters for freeze-thaw durability,
Volumetric proportioning testing (ASTM C457) to quantitatively assess proportioning of concrete in comparison with mix design or specifications,
Bulk resistivity testing (ASTM C1876) to characterize the capillary porosity of concrete mixture(s),
Petrographic examination of aggregates (ASTM C295) to identify potentially deleterious materials with potential for alkali-aggregate reactivity, staining, and/or pop-outs,
and more!
Twining provides the following services for local agencies:
- Initial Engineering Design and Evaluation
- Specification Development and Review
- Construction Quality Assurance Programs
- Materials Review and Verification for Acceptance
- Public Works Inspection
- Source Inspection
- Acceptance Laboratory Testing and Evaluation
- Federal Compliance
- Final Quality Assurance Report and Project Closeout
- Caltrans Quality Assurance Compliance
Our network of sophisticated laboratories is certified, accredited, and/or inspected by CCRL, Caltrans, AASHTO, the Army Corps of Engineers, and other pertinent agencies and is staffed with expert laboratory managers and technicians with experience in critical infrastructure projects.
Why Choose Us?
Our laboratory technicians are highly experienced with testing requirements of different pavement preservation materials. Twining laboratories consistently help public works agencies and contractors to test materials such as:
Slurry Seal
Microsurfacing
REAS
Chip Seal
The typical tests that we perform for such materials are:
Wet Track Abrasion
Asphalt content
Emulsion content
Aggregate gradation
Sand Equivalent
Consistency test (field test)
Our Balcony Inspection Services
Twining offers a range of services tailored to meet the unique needs of property owners and managers. Our services include:
E3s Housing Balcony Inspections (CP1481)
We specialize in conducting thorough inspections in compliance with CP1481 requirements, ensuring the safety of residents and compliance with local regulations.
Structural Integrity Assessments
Our team assesses the structural integrity of your balconies, identifying potential issues related to materials, connections, and load-bearing capacity.
Safety Audits
We conduct safety audits to ensure that your balconies meet the highest safety standards, including railings, guardrails, and fire safety measures.
Exterior Elevated Elements (E3s) Housing Balcony Inspection (CP1481)
An Exterior Elevated Elements (E3s) Housing Balcony Inspection (CP1481) is a comprehensive inspection of the balcony structure, including the railings, decking, and supports. The inspection is performed to identify any potential hazards or defects that could compromise the safety of the balcony.
The CP1481 inspection is based on a set of standards developed by the Canadian Construction Association (CCA). The standards cover a wide range of topics, including:
- Design and construction requirements
- Materials and workmanship requirements
- Inspection and testing requirements
We are certified E3s inspector, and we have the experience and expertise to perform comprehensive Balcony Bill Inspections. Our team is well-versed in the local, state, and national building codes, including the requirements outlined in CP1481. We provide a thorough assessment of your balcony's structural integrity, materials, and overall safety, identify potential hazards, and recommend necessary repairs or improvements.