Apndx-C (A20) Basement Construction r4.pdf

USAF Built Infrastructure Inventory and Assessments

Manual

Appendix for Basement Construction (A20)

This document includes information that shall not be disclosed outside the Government and shall not be duplicated, used or disclosed‐in whole or in part‐for any other purpose than the United States Air Force Built Infrastructure Assessment Program.

July 2020

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Table of Contents I. Overview

A. A20 Basement Construction Description

1. UNIFORMAT II definition

2. Major components

3. Lifecycle characteristics

II. Inventory

A. General A20 Inventory Guidance

B. Inventory A2020 Basement Walls

III. Assessment

A. General A20 Assessment Guidance

B. Assessment A2020 Basement Walls

IV. Inventory and Assessment Rules of Thumb

A. Assessor Qualifications

B. Year Installed

C. Inventory/Assessment

V. Inventory / Assessment Data Collection Sheet

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I. Overview This manual covers the inventory and assessment process for the “Basement Construction (A20)” building system and components. This is an abbreviated manual and does not contain the same level of detail found in expanded manuals. Please see the SMS Playbook for additional information including:

• BUILDERTM Sustainment Management System Concepts

• Overview of ASTM E 1557 UNIFORMAT II Standard Classification for BUILDERTM

• BUILDERTM Inventory Overview

• BUILDERTM Assessment Overview

• BUILDERTM Remote Entry Database (BREDTM)

• Working with Web‐Based BUILDERTM

• Quality Assurance

• Site Visit Preparation and Execution

• Site Visit Safety

A. A20 Basement Construction Description

1. UNIFORMAT II definition

• Basement Construction includes the basement excavation and basement wall construction.

2. Major components

• Basement Excavation (A2010) – This element is an activity and is not used in BUILDERTM

SMS.

• Basement Walls (A2020) – Includes any basement wall material or construction subtype, typically cast‐in‐place (CIP) concrete or Masonry (brick or concrete masonry unit (CMU)).

3. Lifecycle characteristics

• Basement walls are classified as very long‐lived structural building components. Basement walls show slow rates of deterioration.

II. Inventory A. General A20 Inventory Guidance

This section presents common UNIFORMAT II A20 Basement Construction Inventory Component Sections found across USAF installations as a guide for entering into the BUILDERTM SMS or BREDTM software. Inventory items are arranged by BUILDERTM SMS System with Material Category, Component Subtype, Quantity and Inventory Notes.

NOTE: Currently, except for Missile Operations Buildings at Missile Alert Facilities (MAFs) and Launch Support Buildings at Launch Facilities (LFs), A20 components are not routinely required to be inventoried and assessed for BUILDERTM SMS for the Air Force. Bases, however, may elect to inventory and assess basement construction components. A20 Inventory and assessment is required by the current AFCAMP Playbook (Business Rules) as project support documentation for consideration in the project prioritization process for components included in the project Statement of Work.

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Component Subtypes General, Other, and Unknown require a Section Name to further describe the Component Sections. Include additional information in Inventory Comments if required to further describe the Component Sections.

It is critical to confirm the year installed (default from the Real Property Assets Database (RPAD)), or estimate the year installed. BUILDERTM SMS uses the Install Date, life cycle degradation curves and assessment observations to establish a Condition Index (CI) for each Component Section. If the assessor suspects the RPAD default date is not accurate or an addition or renovation has taken place, check the RPAD record for year renovated or check local as‐built or renovation drawings to help determine the year installed. Estimated Install Dates decrease the Expected Service Life significantly.

Every effort should be made to establish an Install Date and avoid the use of estimated.

If this is an initial assessment and no Basement Construction inventory has previously been entered into BUILDERTM SMS, an inventory is required. When Basement Construction is not visible, as‐built drawings should be used to identify and quantify the basement component sections. If as‐built drawings are not available, the assessor may use experience to make an assumption for the component subtypes and quantities based on similar construction of nearby buildings, consultation with local staff and other resources such as www.inspectapedia.com.

B. Inventory A2020 Basement Walls In coastal areas buildings with basements are uncommon due to the water table. More inland bases occasionally have basements. Typical inventory at USAF bases includes the following Component Subtypes:

• CIP Concrete SF

• Concrete Block SF

Use A202001 (Basement Walls Construction, CIP Concrete) to inventory the walls of Missile Alert Facility (MAF), Missile Operations Building (MOB) underground wall structures for the Elevator Shaft, the Tunnel Junction, the Launch Control Center (LCC), the LCC Escape Tunnel, and the Launch Center Electric Building (LCEB). Also use A202001 to inventory the walls of the Launch Facility (LF), Launch Support Building (usually referred to as the Electrical Power Station Building) underground wall structures.

Basement Walls A2020 Inventory Hints

• Material is almost always concrete or concrete masonry units. Classify brick as other and include a Section Name.

• Quantity is easily measured from visual observation or as‐built drawings.

• Do not use BASEMENT for a Section Name in this case because inventory is entered as part of A2020 Basement Walls.

• Inventory Comments should be recorded to clarify component description if Section Name is insufficient.

• If basement walls are not visible, an Inspection Comment must be provided.

http://www.inspectapedia.com/

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III. Assessment A. General A20 Assessment Guidance

Basement construction component sections are assessed using Direct Condition Rating (DCR). Usually basement construction components will be visible and accessible. When Component Sections are not visible, assessment is based on operability or serviceability (work history).

If basement walls are not visible an Inspection Comment must be provided.

When basement component sections are visible, they should be assessed.

Note: If no assessment is entered into BUILDERTM SMS, the install date as the initial assessment is considered as the latest assessment and assessment currency is calculated from this date.

Under no circumstances should age be factored into a DCR or Distress Survey assessment. Ratings are based on condition, operability and/or serviceability (work history) only. BUILDERTM SMS already factors in the age from the Install Date when BUILDERTM SMS calculates Condition Index (CI).

The following conditions or events can accelerate deterioration:

• Improper construction or installation

• Settlement or subsidence

• Material damage

• Flooding

• Earthquake

• Landslide

• Soil erosion

• Moisture infiltration

The assessor may observe conditions in the visible basement major components such as cracking, displacement or other damage. These conditions may also be visible in interior or exterior walls and the floor. If observed the assessor must consider the severity and density of these conditions to determine the DCR using the DCR chart below.

The assessor must provide an Inspection Comment for any Amber+ or lower DCR or BUILDERTM SMS calculated Distress Survey Rating. . Unless the condition is based on serviceability, compliance, or a condition that cannot be visually documented, photograph documentation is highly recommended to be attached to the assessment.

When there is visible deterioration or defects of a system/component, a picture provides a lot of value. When accomplishing the 5‐year reassessment, especially when it is a different assessor, the assessor can compare the then to now. Even if it is the same assessor sees a particular asset frequently (possibly yearly during annual PM), the assessor may not notice the gradual degradation so a picture provides great value. Please consult local ISSO for correct procedures on taking pictures, reviewing picture content and transferring data to AFNET to ensure INFOSEC, COMSEC, OPSEC compliance.

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Following the BUILDERTM SMS assessment, the assessor should inform the facility manager of any new issues discovered.

DIRECT CONDITION RATING MATRIX

NOTE: Red highlighted text below is provided as an example of a life cycle of a typical components and should be adjusted as needed to represent other various components.

Direct Condition Rating (DCR) Definitions

Rating Observation Green (+) Fully Operational ‐ Free of Known or Observable Defects

Keep doing PM required to maintain warranty ‐no action required Green Fully Operational ‐ Slight Deterioration or Minimal wear

Keep doing PM ‐ no action required

Green (‐) Fully Operational – Normal wear and/or serviceability defects Keep doing PM ‐ need to start planning for rehabilitation

Amber (+) Reduced Operation – Minor wear and/or serviceability defects Repairs or replacement can be planned if good return on investment; within the FYDP. (Investment of resources could extend life)

Amber Reduced Operation – Moderate wear and/or serviceability defects Repairs or replacement can be planned if good return on investment; within the FYDP (Investment of resources could extend life).

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Direct Condition Rating (DCR) Definitions

Rating Observation Amber (‐) Reduced Operation – Significant wear and/or serviceability defects

Repairs or replacement can be planned if good return on investment; within the FYDP (Investment of resources could extend life).

Red (+) Loss of Operation – Moderate wear and/or serviceability failure Repairs or replacement must be planned within the short term (High risk to Mission ‐Run to failure ‐further investment unwise)

Red Repairs or replacement must be planned within one year (High risk to Mission ‐ Run to failure ‐further investment unwise)

Red (‐) Loss of Operation – Complete wear and/or serviceability failure Repair or Replacement needs to be planned immediately

B. Assessment A2020 Basement Walls

Basement walls may or may not be visible from the interior if the basement is accessible and wall finishes do not obscure the walls. They may be partially visible from the exterior. If the basement is not accessible, no inventory or assessment will normally be entered unless the assessor has access to an engineering report allowing BUILDERTM to compute a CI based on condition. If no assessment is entered, the computed condition projections will be Age‐Based and the most recent inspection the install date.

Below are assessment hint questions to help the assessor determine the most appropriate DCR.

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Examples of typical basement walls distresses or conditions include Cracks, leaks or displacement.

Basement Walls A2020 Assessment Hints

• What is the service/repair history of the component?

• Is there a compliance issue? Refer to the BUILDERTM Direct Condition Rating

Matrix for DCR.

• Will repairs preserve or extend the remaining service life of the electrical component?

Based on the above:

• Select a DCR from the chart.

• If assessment “Rating” is Amber + or below, enter an Inspection Comment to describe the reason. Unless the condition is based on operability, serviceability, compliance, or a condition that cannot be visually documented, photograph documentation of the defect(s) is highly recommended to be attached to the assessment.

• An Inspection Comment should also be entered regardless of DCR, if a significant localized issue needs to be highlighted which may not necessarily impact the overall Component Section DCR.

1. Cracked & Displaced Basement Wall

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IV. Inventory and Assessment Rules of Thumb

A. Assessor Qualifications

• The architectural/structural assessor should have a combination of 8+ years of general building construction, facilities maintenance and planning/estimating experience related to building foundations, structure, enclosure and interior construction or be equivalent to a Journeyman, a V Level Technician, an Architect or a Civil Engineer. The assessor should have a working knowledge of the ASTM E 1557 Standard Classification for Building Elements UNIFORMAT II and a basic understanding of other building systems such as HVAC, Plumbing, Fire Protection and Electrical. The assessor should be able to identify common building materials, techniques and structural/architectural system types/elements, be proficient at reading drawings and engineering reports and have experience identifying common problems related to architectural/structural systems. The lead architectural/structural assessor may be supported by less experienced staff during the inventory and assessment.

B. Year Installed

• In some cases basement wall sections may be replaced as an individual repair or partial replacement. These areas would have a different age. The RPAD construction and renovation dates should be confirmed. If dates are not appropriate, the age of the basement walls must be estimated. The building occupants or other facilities staff may be able to provide some information.

• If construction drawings or as‐built drawings are available, look for date published to assist with determining age of materials.

• Additions, new wings or major renovations likely require identifying separate foundation component sections with different ages.

• In the case of basement walls, the assessor must use judgment in sectioning basement walls. These components should be sectioned in the manner they are generally managed. If there are new basement walls, a separate section for a single new foundation is not necessary. However, if there are two major types or ages of basement walls, then separate sectioning is a good idea.

C. Inventory/Assessment

• If as‐built drawings can be located, they should indicate foundation type, material and quantity.

V. Inventory / Assessment Data Collection Sheet Construction drawings, floor plans, or digital device are commonly used. Use whatever collection method works best for the individual assessor/organization.