ASTM C1714/C1714M-23

Standard Specification for Preblended Dry Mortar Mix for Unit Masonry

ABSTRACT
This specification covers unit masonry mortars whose material and design requirements are governed by a referenced ASTM document stated herein, but are preblended dry in a factory instead of produced from individual raw materials delivered to the job-site. Because field sampling, testing, directly comparable test results, packaging, and traceability of ingredients of preblended dry mortar mix differ from job site mixed mortars, this specification particularly addresses these issues, along with the tight control of ingredient ratios possible with preblended dry mortars.
SCOPE
1.1 This specification covers masonry mortars whose materials and design requirements are governed by Specification C270 but are preblended dry in a factory instead of produced from individual raw materials delivered to the job-site.  
1.2 The field-sampling, testing, directly comparable test results, packaging, and the traceability of ingredients of preblended dry mortar mix differ from job site mixed mortars and this standard specifically addresses these issues. The tight control of ingredient ratios possible with preblended dry mortar is also covered.  
1.3 The text of this specification refers to notes and footnotes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered the requirements of the standard.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 14-Aug-2023
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C12 - Mortars and Grouts for Unit Masonry
• Drafting Committee: C12.03 - Specifications for Mortars

Relations

• Refers: ASTM C1384-23 - Standard Specification for Admixtures for Masonry Mortars
• Effective Date: 01-Dec-2023
• Refers: ASTM C305-20 - Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
• Effective Date: 15-Jul-2020
• Refers: ASTM C270-19ae1 - Standard Specification for Mortar for Unit Masonry
• Effective Date: 01-May-2019
• Refers: ASTM C270-19a - Standard Specification for Mortar for Unit Masonry
• Effective Date: 01-May-2019
• Refers: ASTM C270-19 - Standard Specification for Mortar for Unit Masonry
• Effective Date: 01-Feb-2019
• Refers: ASTM C1586-18 - Standard Guide for Quality Assurance of Mortars
• Effective Date: 15-Dec-2018
• Refers: ASTM C1180-18 - Standard Terminology of Mortar and Grout for Unit Masonry
• Effective Date: 01-Dec-2018
• Refers: ASTM C780-18 - Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
• Effective Date: 01-Jul-2018
• Refers: ASTM C1384-18 - Standard Specification for Admixtures for Masonry Mortars
• Effective Date: 01-Jun-2018
• Refers: ASTM C1384-18e1 - Standard Specification for Admixtures for Masonry Mortars
• Effective Date: 01-Jun-2018
• Refers: ASTM C144-17 - Standard Specification for Aggregate for Masonry Mortar
• Effective Date: 15-Dec-2017
• Refers: ASTM C1586-17 - Standard Guide for Quality Assurance of Mortars
• Effective Date: 15-Dec-2017
• Refers: ASTM C1384-17 - Standard Specification for Admixtures for Masonry Mortars
• Effective Date: 01-Dec-2017
• Refers: ASTM C780-17 - Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
• Effective Date: 01-Jun-2017
• Refers: ASTM C780-16a - Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
• Effective Date: 01-Dec-2016

Overview

ASTM C1714/C1714M-23: Standard Specification for Preblended Dry Mortar Mix for Unit Masonry establishes comprehensive requirements for preblended dry mortar mixes, which are factory-produced rather than mixed on-site from individual raw materials. Developed by ASTM Committee C12, this international standard is essential for ensuring the consistency, quality, and traceability of preblended dry mortar products used in unit masonry applications.

The standard provides specifications on material composition, batching accuracy, sampling, packaging, testing, documentation, and certification procedures for producers and users of preblended dry mortar mix. It also addresses unique considerations related to ingredient traceability and field-to-laboratory test comparability, making it critical for manufacturers, suppliers, contractors, and quality assurance professionals in the masonry industry.

Key Topics

• Definition and Composition: Clarifies what constitutes a preblended dry mortar mix, typically including dry aggregates, portland cement, lime, or masonry cement, blended in a controlled factory environment. May include additives for specific performance enhancements such as water repellency, workability, or pigment for color.
• Referenced Standards: Integrates requirements from key standards, including ASTM C270 (mortar for unit masonry), C144 (aggregate), C1384 (admixtures), and others governing materials, admixture quality, and testing practices.
• Ingredient Control and Traceability: Emphasizes tight control of ingredient ratios using precise batching and archiving of batch information, including batch or run numbers for traceability throughout the supply chain. All ingredients are dry, measured by weight, and thoroughly blended before packaging.
• Sampling and Testing: Outlines procedures for laboratory and field sampling to ensure compliance with property or proportion specifications. Laboratory test results are considered definitive; field results after water addition are not directly comparable.
• Packaging and Labeling: Details labeling requirements for traceability, including manufacturer name, ingredient weight, mortar type, and presence of any additives. Includes specific guidance for packaged, bulk, or silos delivered on-site.
• Certification and Documentation: Describes required documentation, such as delivery tickets with batching information, ongoing compliance verification, and storage of batch records for a minimum of twelve months.

Applications

ASTM C1714/C1714M-23 is widely used in:

• Commercial and residential masonry construction: Preblended dry mortar mix ensures consistent performance and material quality for brickwork, blockwork, and stonework, reducing variability from on-site mixing processes.
• Quality assurance in large-scale projects: The standard's traceability and documentation requirements facilitate robust quality control and verification throughout construction projects.
• Manufacturing and distribution: Enables mortar producers to deliver ready-to-use, traceable products that align with project specifications and industry best practices.
• Compliance with building codes: Supports inspectors, engineers, and code officials in verifying adherence to standards for safety, durability, and performance in masonry walls and structures.

Related Standards

This specification references and aligns with several key ASTM standards, including:

• ASTM C270: Specification for Mortar for Unit Masonry
• ASTM C144: Specification for Aggregate for Masonry Mortar
• ASTM C1384: Specification for Admixtures for Masonry Mortars
• ASTM C260/C260M: Specification for Air-Entraining Admixtures
• ASTM C979/C979M: Specification for Pigments for Integrally Colored Concrete
• ASTM C305: Practice for Mechanical Mixing of Cement Pastes and Mortars
• ASTM C780: Test Methods for Preconstruction and Construction Evaluation of Mortars
• ASTM C1586: Guide for Quality Assurance of Mortars

By following ASTM C1714/C1714M-23, stakeholders in the masonry industry benefit from enhanced consistency, tighter quality control, and full traceability for preblended dry mortar mix, supporting safe, durable, and compliant construction.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1714/C1714M − 23
Standard Specification for
Preblended Dry Mortar Mix for Unit Masonry
This standard is issued under the fixed designation C1714/C1714M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
1.1 This specification covers masonry mortars whose mate-
2.1 ASTM Standards:
rials and design requirements are governed by Specification
C144 Specification for Aggregate for Masonry Mortar
C270 but are preblended dry in a factory instead of produced
C260/C260M Specification for Air-Entraining Admixtures
from individual raw materials delivered to the job-site.
for Concrete
C270 Specification for Mortar for Unit Masonry
1.2 The field-sampling, testing, directly comparable test
C305 Practice for Mechanical Mixing of Hydraulic Cement
results, packaging, and the traceability of ingredients of pre-
Pastes and Mortars of Plastic Consistency
blended dry mortar mix differ from job site mixed mortars and
C780 Test Methods for Preconstruction and Construction
this standard specifically addresses these issues. The tight
Evaluation of Mortars for Plain and Reinforced Unit
control of ingredient ratios possible with preblended dry mortar
Masonry
is also covered.
C979/C979M Specification for Pigments for Integrally Col-
1.3 The text of this specification refers to notes and
ored Concrete
footnotes, which provide explanatory material. These notes and
C1180 Terminology of Mortar and Grout for Unit Masonry
footnotes (excluding those in tables and figures) shall not be
C1384 Specification for Admixtures for Masonry Mortars
considered the requirements of the standard.
C1403 Test Method for Rate of Water Absorption of Ma-
1.4 The values stated in either SI units or inch-pound units
sonry Mortars
are to be regarded separately as standard. The values stated in
C1437 Test Method for Flow of Hydraulic Cement Mortar
each system may not be exact equivalents; therefore, each
C1586 Guide for Quality Assurance of Mortars
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
3. Terminology
with the standard.
3.1 For definition of terms used in this specification, refer to
1.5 This standard does not purport to address all of the
Terminology C1180.
safety concerns, if any, associated with its use. It is the
3.2 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- 3.2.1 preblended dry mortar mix, n—a mix of dry aggregate;
mine the applicability of regulatory limitations prior to use.
portland cement and hydrated lime, blended hydraulic cement,
(Warning—Fresh hydraulic cementitious mixtures are caustic
masonry cement, hydraulic cement, or mortar cement; and may
and may cause chemical burns to skin and tissue upon
contain additives used to enhance one or more properties such
prolonged exposure.)
as setting time, workability, water retention, bond and durabil-
1.6 This international standard was developed in accor-
ity or color pigment; and are thoroughly blended together at the
dance with internationally recognized principles on standard- factory without the addition of water.
ization established in the Decision on Principles for the
3.2.2 additive, n—a dry mortar material other than the
Development of International Standards, Guides and Recom-
Specification C270 prescribed materials of aggregate and
mendations issued by the World Trade Organization Technical
cementitious materials that is added to a dry mortar mix at the
Barriers to Trade (TBT) Committee.
batch plant to modify one or more properties of the conven-
tional masonry mortar.
This specification is under the jurisdiction of ASTM Committee C12 on
Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-
mittee C12.03 on Specifications for Mortars. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Aug. 15, 2023. Published September 2023. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2009. Last previous edition approved in 2019 as C1714/C1714M – 19a. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C1714_C1714M-23. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1714/C1714M − 23
4. Classification 7.6 All of the dry mortar mix ingredients shall be thor-
oughly blended.
4.1 The classifications of mortars in this specification are as
7.7 The preblended dry mortar mix shall be stored and
described in Specification C270. Mortar type selected shall be
a Type M, S, N, or O meeting the requirements of either the covered in such a manner as to prevent hardening,
deterioration, contamination, and segregation.
Property Specification or the Proportion Specifications.
7.8 Except for water, no mortar materials, wet or dry, shall
5. Specifying Mortar
be added to the mortar mix or the resulting masonry mortar
after the initial blending of the dry mortar materials in the batch
5.1 Specify type of mortar desired.
plant unless otherwise specified and approved by the manufac-
5.2 Preblended dry mortar mix shall be a mortar meeting
turer of the preblended mortar mix.
both the requirements of Specification C270 and the require-
ments of this specification.
8. Sampling
5.2.1 The property specification requirements of Specifica-
8.1 For mortars produced to property specifications, all
tion C270 shall govern unless the proportion specification
samples for determining compliance with this specification
requirements are specified.
shall be both uncontaminated and sampled prior to the addition
of water.
6. Materials
8.2 Samples shall be of sufficient size to conduct all of the
6.1 Materials shall conform to Specification C270 except as
desired testing. At a minimum, take three random samples of at
follows:
least 2.3 kg [5 lb] each and combine them to form a single
6.1.1 Additives—Shall comply with the admixture require-
sample.
ments of Specification C1384, except as follows:
8.2.1 For mortars sold in packages up to 45 kg [100 lb],
6.1.1.1 The Specification C1384 reference mortar shall be
select whole packages as necessary for required testing.
this mortar without the additives and the Specification C1384
8.2.1.1 Mix the entire contents of the package or packages
admixed mortar shall be this mortar with the additives.
before selecting random samples in accordance with 8.2.
6.1.1.2 When more than one additive meeting the require-
8.3 Field samples taken from the original containers shall be
ments of Specification C1384 is used, the chloride limits of
marked with the package markings as described in Section 14.
Specification C1384 shall apply to the sum of all of these
The date of sampling shall also be included.
additives.
8.3.1 Samples taken from job site silos shall be marked with
6.1.1.3 Air entraining additives shall comply with the ad-
silo number or location and the sample date. If possible, the
mixture requirements of Specification C260/C260M.
samples shall also be marked with the package markings from
6.1.2 Additives used as coloring pigments shall comply
the original containers.
with the requirements of C979/C979M.
NOTE 2—Silos are typically filled from large bulk bags or super sacks,
6.2 As required by Specification C270, mortar mixes con-
these large bags will have the product identification markings from
forming to the Proportion Specification requirements shall not
Section 14 and may still be available on the job-site.
contain more than one air entraining material.
8.3.2 Samples taken at the job site from a mobile batch plant
shall be marked in accordance with Section 14.1.2.
7. Manufacture and Use
9. Testing
7.1 All of the mortar mix materials shall be dry and
measured by weight. The batch scales shall be calibrated at
9.1 Testing shall be conducted in accordance with Specifi-
least annually and shall be capable of consistently measuring
cation C270 with the following exceptions:
each ingredient to within 1 % of the total batch weight for each
9.1.1 For mortar mixes meeting the proportion specifica-
ingredient that is added at a rate of at least 20 % of total batch
tions of C270, testing shall be performed by using verification
weight, and to within 5 % of the individual ingredients weight
of ingredient proportions (batch tickets) archived from 7.3. In
for each ingredient that is added at a rate of less than 20 % of
addition, the aggregate shall be tested for compliance with the
total batch weight.
requirements of Specification C144.
9.1.2 Mixing—Mix 3000 6 3 g [6.61 6 0.01 lb] of
7.2 Each ingredient shall be added within a tolerance of
preblended dry mortar mix in accordance with Practice C305
610 % of the individual ingredients’ target weight.
with the exception that the combined material is added at the
7.3 The weight of each mortar mix ingredient of the final
time of cement addition in Practice C305. Additional water
batch shall be recorded and archived for every batch.
may be added in the final mix period to adjust the flow.
NOTE 1—This batch information is commonly referred to as a batch
Determine the flow in accordance with Test Method C1437.
ticket.
Use sufficient water to produce a flow of 110 6 5 %
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1714/C1714M − 19a C1714/C1714M − 23
Standard Specification for
Preblended Dry Mortar Mix for Unit Masonry
This standard is issued under the fixed designation C1714/C1714M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers masonry mortars whose materials and design requirements are governed by Specification C270 but
are preblended dry in a factory instead of produced from individual raw materials delivered to the job-site.
1.2 The field-sampling, testing, directly comparable test results, packaging, and the traceability of ingredients of preblended dry
mortar mix differ from job site mixed mortars and this standard specifically addresses these issues. The tight control of ingredient
ratios possible with preblended dry mortar is also covered.
1.3 The text of this specification refers to notes and footnotes, which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered the requirements of the standard.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns
to skin and tissue upon prolonged exposure.)
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
C144 Specification for Aggregate for Masonry Mortar
C260/C260M Specification for Air-Entraining Admixtures for Concrete
C270 Specification for Mortar for Unit Masonry
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C780 Test Methods for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C979/C979M Specification for Pigments for Integrally Colored Concrete
This specification is under the jurisdiction of ASTM Committee C12 on Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcommittee C12.03
on Specifications for Mortars.
Current edition approved May 1, 2019Aug. 15, 2023. Published June 2019September 2023. Originally approved in 2009. Last previous edition approved in 2019 as
C1714/C1714M – 19.C1714/C1714M – 19a. DOI: 10.1520/C1714_C1714M-19A.10.1520/C1714_C1714M-23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1714/C1714M − 23
C1180 Terminology of Mortar and Grout for Unit Masonry
C1384 Specification for Admixtures for Masonry Mortars
C1403 Test Method for Rate of Water Absorption of Masonry Mortars
C1437 Test Method for Flow of Hydraulic Cement Mortar
C1586 Guide for Quality Assurance of Mortars
3. Terminology
3.1 For definition of terms used in this specification, refer to Terminology C1180.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 preblended dry mortar mix, n—a mix of dry aggregate; portland cement and hydrated lime, blended hydraulic cement,
masonry cement, hydraulic cement, or mortar cement; and may contain additives used to enhance one or more properties such as
setting time, workability, water retention, bond and durability or color pigment; and are thoroughly blended together at the factory
without the addition of water.
3.2.2 additive, n—a dry mortar material other than the Specification C270 prescribed materials of aggregate and cementitious
materials that is added to a dry mortar mix at the batch plant to modify one or more properties of the conventional masonry mortar.
4. Classification
4.1 The classifications of mortars in this specification are as described in Specification C270. Mortar type selected shall be a Type
M, S, N, or O meeting the requirements of either the Property Specification or the Proportion Specifications.
5. Specifying Mortar
5.1 Specify type of mortar desired.
5.2 Preblended dry mortar mix shall be a mortar meeting both the requirements of Specification C270 and the requirements of this
specification.
5.2.1 The property specification requirements of Specification C270 shall govern unless the proportion specification requirements
are specifically requested.specified.
6. Materials
6.1 Materials shall conform to Specification C270 except as follows:
6.1.1 Additives—Shall comply with the admixture requirements of Specification C1384, except as follows:
6.1.1.1 The Specification C1384 reference mortar shall be this mortar without the additives and the Specification C1384 admixed
mortar shall be this mortar with the additives.
6.1.1.2 When more than one additive meeting the requirements of Specification C1384 is used, the chloride limits of Specification
C1384 shall apply to the sum of all of these additives.
6.1.1.3 Air entraining additives shall comply with the admixture requirements of Specification C260/C260M.
6.1.2 Additives used as coloring pigments shall comply with the requirements of C979/C979M.
6.2 As required by Specification C270, mortar mixes conforming to the Proportion Specification requirements shall not contain
more than one air entraining material.
7. Manufacture and Use
7.1 All of the mortar mix materials shall be dry and measured by weight. The batch scales shall be calibrated at least annually
and shall be capable of consistently measuring each ingredient to within 1 % of the total batch weight for each ingredient that is
C1714/C1714M − 23
added at a rate of at least 20 % of total batch weight, and to within 5 % of the individual ingredients weight for each ingredient
that is added at a rate of less than 20 % of total batch weight.
7.2 Each ingredient shall be added within a tolerance of 610 % of the individual ingredients’ target weight.
7.3 The weight of each mortar mix ingredient of the final batch shall be recorded and archived for every batch.
NOTE 1—This batch information is commonly referred to as a batch ticket.
7.4 A run number or batch number or some other marking used to ensure traceability of the batch shall be assigned to each batch
and retained as part of the batch archive.
7.5 The batch information of 7.3 and 7.4 shall be archived for a minimum of twelve months from date of manufacture.
7.6 All of the dry mortar mix ingredients shall be thoroughly blended.
7.7 The preblended dry mortar mix shall be stored and covered in such a manner as to prevent hardening, deterioration,
contamination, and segregation.
7.8 Except for water, no mortar materials, wet or dry, shall be added to the mortar mix or the resulting masonry mortar after the
initial blending of the dry mortar materials in the batch plant unless otherwise specified and approved by the manufacturer of the
preblended mortar mix.
8. Sampling
8.1 For mortars produced to property specifications, all samples for determining compliance with this specification shall be both
uncontaminated and sampled prior to the addition of water.
8.2 Samples shall be of sufficient size to conduct all of the desired testing. At a minimum, take three random samples of at least
2.3 kg [5 lb] each and combine them to form a single sample.
8.2.1 For mortars sold in packages up to 45 kg [100 lb], select whole packages as necessary for required testing.
8.2.1.1 Mix the entire contents of the package or packages before selecting random samples in accordance with 8.2.
8.3 Field samples taken from the original containers shall be marked with the package markings as described in Section 14. The
date of sampling shall also be included.
8.3.1 Samples taken from job site silos shall be marked with silo number or location and the sample date. If possible, the samples
shall also be marked with the package markings from the original containers.
NOTE 2—Silos are typically filled from large bulk bags or super sacks, these large bags will have the product identification markings from Section 14
and may still be available on the job-site.
8.3.2 Samples taken at the job site from a mobile batch plant shall be marked in accordance with Section 14.1.2.
9. Testing
9.1 Testing shall be conducted in accordance with Specification C270 with the following exceptions:
9.1.1 For mortar mixes meeting the proportion specifications of C270, testing shall be performed by using verification of
ingredient proportions (batch tickets) archived from 7.3. In addition, the aggregate shall be tested for compliance with the
requirements of Specification C144.
9.1.2 Mixing—Mix 3000 6 3 g [6.61 6 0.01 lb] of preblended dry mortar mix in accordance with Practice C305 with the
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