Expanded Metal Manufacturers Association Division of NATIONAL ASSOCIATION OF ARCHITECTURAL METAL MANUFACTURERS NAAMM EMMA 557-15 EXPANDED METAL 5d NAAMM EMMA 557-15 EXPANDED METAL 5d EMMA 557 -15 NAAMM STANDARD STANDARDS FOR EXPANDED METAL INTRODUCTION PRODUCT SELECTION CONSIDERATIONS TERMINOLOGY MANUFACTURING PROCESS MANUFACTURING TOLERANCES APPLICATIONS
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STANDARD NAAMM EMMA 557 · naamm emma 557-15 standard standards for expanded metal introduction product selection considerations terminology manufacturing process manufacturing tolerances
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Expanded Metal Manufacturers Association Division of
NATIONAL ASSOCIATION OFARCHITECTURAL METAL MANUFACTURERS
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5dEMMA 557-15NAAMM
STANDARD
STANDARDS FOREXPANDED METAL
INTRODUCTION
PRODUCT SELECTION CONSIDERATIONS
TERMINOLOGY
MANUFACTURING PROCESS
MANUFACTURING TOLERANCES
APPLICATIONS
DISCLAIMERThis standard was developed by representative members of the ExpandedMetal Manufacturers Association Division (EMMA) of the National Associationof Architectural Metal Manufacturers (NAAMM) to provide their opinion andguidance on expanded metal products. This standard contains advisory infor-mation only and is published as a public service by NAAMM and its EMMADivision. NAAMM and its EMMA Division disclaim all liability of any kind for theuse, application, or adaptation of material published in this standard.
EMMA DIVISION OF NAAMMThe Expanded Metal Manufacturers Association (EMMA) is a Division ofNAAMM, the National Association of Architectural Metal Manufacturers.NAAMM, established in 1938, represents manufacturers and f abricators ofmetal products used chiefly for commercial and industrial applications.NAAMM publishes and distributes technical information and specifications fora wide range of metal products. Current information on all NAAMM publica-tions may be obtained by calling or by visiting our website at naamm.org.
National Association of Architectural Metal Manufacturers800 Roosevelt Road, Building C, Suite 312, Glen Ellyn, Illinois 60137
Website: www.naamm.orgNational Association of Architectural Metal Manufacturers
Versatile is the key word which describes ExpandedMetal. New applications are found for it every day inindustry, stores, offices and the home.
Common terminology, manufacturing techniques andtolerances, specifications for standard products, andsome uses of these products are covered in detail in this guide.
This manual shows you how to put this extraordinarymaterial to work. However, the manual is designed asan introductory guide only, and the figures and specifi-cations are not to be construed as product or perfor-mance guarantees or as warranties for fitness for anyparticular purpose. For answers to specific questionsregarding properties and applications of ExpandedMetal, consult an Expanded Metal manufacturer.
enclosure, pro-tection, support, decoration, and filtration, includinggrills, fencing, walkways, furniture, etc.
Expanded Metal saves energy,
INTRODUCTION
2
PRODUCT SELECTION CONSIDERATIONS
PRODUCT SELECTION CONSIDERATIONS
3
EXPANDED METAL USES
PRODUCT SELECTION CONSIDERATIONS
4
PRODUCT SELECTION CONSIDERATIONS
5
GLOSSARY OF EXPANDED METALTERMS
Example:
TERMINOLOGY
6
RECOMMENDED NOMENCLATURE
Example:
Example:
Example:
Example:
Example:
Example:
TERMINOLOGY
7
Table A NOMINAL WEIGHTS AND DIMENSIONS*
Strand Minimum Nominal Design Opening Size Overall No. of thick- Weight in Size Size (Inches) Thick- Diamonds (%) ness Lbs. per (Inches)C (Inches)C Thick- ness Per Ft. Open Style (Inches)A 100 Sq. Ft.B SWD LWD SWO LWO Width ness (Inches) SWD LWD AreaSTANDARD-CARBON STEEL
11⁄2"-.080 .074 22 1.33 3.00 1.149 2.500 .128 .080 .266 9 4 81 11⁄2"-.125 .118 43 1.33 3.00 1.080 2.500 .162 .125 .346 9 4 76A The minimum thickness is absolute, not subject to minus variation.B A variation in weight per square ft. of ±10 % is permissible, based on the weight of any sheet or bundle.C A tolerance of ±10 % is permitted in dimensions, center to center.
FOR METRIC CONVERSION OF VALUES IN TABLES A, B, C, D, E, and F
From To MultiplyInch-Pound Units Metric Units by
inch (in) mm 25.4foot (ft) mm 304.8foot (ft) meter (m) 0.3048lb (Mass) kg 0.4536lbs (Mass) per sq ft kg per sq meter (kg/m2) 4.882lbs (Mass) per 100 sq ft kg per sq meter (kg/m2) 0.4882lb (Force) Newton (N) 4.448lbs (Force) per sq ft Pascal (Pa) 47.88No. of Diamonds per foot No. of Diamonds per meter 3.28
From To MultiplyInch-Pound Units Metric Units by
inch (in.) mm 25.4foot (ft) mm 304.8foot (ft) meter (m) 0.3048lb (Mass) kg 0.4536lbs (Mass) per sq ft kg per sq meter (kg/m2) 4.882lbs (Mass) per 100 sq ft kg per sq meter (kg/m2) 0.4882lb (Force) Newton (N) 4.448lbs (Force) per sq ft Pascal (Pa) 47.88No. of Diamonds per foot No. of Diamonds per meter 3.28
FOR METRIC CONVERSION OF VALUES IN TABLES A, B, C, and D
11⁄2"-.080 .056 18 1.330 3.15 1.044 2.750 .143 .060 .060 9 3.8 78 11⁄2"-.125 .089 36 1.330 3.15 .968 2.750 .181 .094 .094 9 3.8 73A The minimum thickness is absolute, not subject to minus variation.B A variation in weight per square ft. of ±10 % is permissible, based on the weight of any sheet or bundle.C A tolerance of ±10 % is permitted in dimensions, center to center.
Table C NOMINAL WEIGHTS AND DIMENSIONS*
Strand Design Opening Size Overall No. of Weight in Size Size (Inches) Thick- Diamonds (%) Lbs. per (Inches)C (Inches)C Thick- ness Per Ft. Open Style 100 Sq. Ft.B SWD LWD SWO LWO Width ness (Inches) SWD LWD Area
Note: Small diamond designs are available in other alloys such as aluminum, stainless steel, nickel, gold, platinum, zirconium and silver.
B A variation in weight per square ft. of ±10 % is permissible, based on the weight of any sheet or bundle.C A tolerance of ±10 % is permitted in dimensions, center to center.
TERMINOLOGY
9
Table DNOMINAL WEIGHTS AND DIMENSIONS*
Strand Design Opening Size Overall No. of Nominal Size Size (Inches) Thick- Diamonds (%) Weight in lbs. (Inches)B (Inches)B Thick- ness Per Ft. Open Style Per Sq. Ft.A SWD LWD SWO LWO Width ness (Inches) SWD LWD Area GRATING-CARBON STEEL
2.0 lb. 2.0 1.33 5.33 .940 3.44 .387 .250 .730 9 2.25 48A A variation in weight per square ft. of ± 5 % is permissible, based on the weight of any sheet or bundle.B A tolerance of ± 5 % is permitted in dimensions, center to center.
“The design, selection and adaptability of Expanded Metal grating for spe-cific uses must be determined by the buyer. The guidelines and specifica-tions listed in this manual including Table E below, are not to be construedas a warranty by the Expanded Metal Manufacturers Association or itsmembers of the fitness of any product for any given use or purpose.”
TERMINOLOGY
Table E - Concentrated Load Deflection Tables for a Fixed-Fixed SpanCarbon Steel
Style(lbs. per sq. ft)
24-Inch Span 36-inch Span
3.0#
Concentrated Load Capacity (lb./ft.)
274 126
Deflection Under Allowed Concentrated Load (in.)
0.25 0.25
3.14#
Concentrated Load Capacity (lb./ft.)
340 117
Deflection Under Allowed Concentrated Load (in.)
0.25 0.25
4.0#
Concentrated Load Capacity (lb./ft.)
468 201
Deflection Under Allowed Concentrated Load (in.)
0.25 0.25
4.27#
Concentrated Load Capacity (lb./ft.)
419 196
Deflection Under Allowed Concentrated Load (in.)
0.25 0.25
AluminumStyle
(lbs. per sq. ft)24-Inch Span 36-inch Span
2.0#
Concentrated Load Capacity (lb./ft.)
320 136
Deflection Under Allowed Concentrated Load (in.)
0.25 0.25
Notes:1. Concentrated load is applied at mid-span and is in units of pounds per foot of grating width.2. Deflection is at the mid-span, and is measured in inches3. The test specimens on which this table is measured were welded at alternate strands to an angle fixture. Testing shows that if the ends are not so welded, the capacity of the grating is drastically reduced.