Several of the tests required for complete characterization of the lyurethane foam and upholstery fabric were not performed due to the required specimen sizes or numbers, the limited availabity of material, the reed for virgin material. or the lack of the required test equipment. Overall results from the materials evaluation for each chair specimen are presented in Section 5.1 of this report. 4.4 Physical Evaluation The physical evaluation of each specimen involved the internal visual and dimensional examination of the chair components and the manufacturing techniques involved in the assembly of the major chair components into pleted products. The manufacturing options available for use are Covered in Federal Specification AA-C-001771B under the following headings 3. REQUIREMENTS 3.2 Material. 3.2.5 Hardware. 3.2.5.2 Casters 3.2.5.3 Glides. 3.2.5.4 Chair Controls. 3.2.5.4.1 Chair controls, Type I. Type II chairs. 3.2.5.4.2 Chair controls, Type III chairs. 3.4.6.2.6 Seat and back padding. (a), (b) 3.4.6.2.7 Upholstery cover and shell attachment. (a). (b) 3.4.6.3 Type II, Style B chair. - Requirements as previously specified in sections pertaining to the base (3.4.6.1.1), chair controls (3.2.5.4.1), shells (3.4.4.1). chassis, spider arms and spindle (3.2.5.4.6), seat and back padding (3.4.6.2.6). and upholstery cover and shell attachment (3.4.6.2.7). 3.4.6.4 Type III, Style A chair. - Requirements as previously specified in sections pertaining to the chair controls (3.2.5.4.2) shells (3.4.4.1), arms (3.4.5). seat and back padding (3.4.6.2.6), and upholstery cover and shell attachment (3.4.6.2.7). 3.4.6.4.1 Base. 3.4.6.4.4 Chassis, spider arms and spindle. 3.4.6.5 Type III, Style B chair. - Requirements as previously specified for the base (3.4.6.4.1), chair controls (3.2.5.4.2), shells (3.4.4.1), chassis, spider arms and spindle (3.4.6.4.4). seat and back padding (3.4.6.2.6), and upholstery cover and shell attachment (3.4.6.2.7). 3.4.6.6 Type IV. Style B chair. - Requirements as previously specified in sections pertaining to the base (3.4.6.1.1), chair controls (3.2.5.4.4). back tilting unit (3.2.5.4.5), shells (3.4.4.2), and the chassis, spider arins and spindle (3.2.5.4.6). 3.4.6.6.6 Back upright. 3.4.6.6.7 Seat and back padding. 3.4.6.6.8 Seat upholstery cover and shell attachment. 3.4.6.6.9 Back upholstery cover and shell attachment. Overall results from the physical evaluation for each chair specimen are given in Section 5.1 of this report. 4.5 Mechanical Tests Several performance tests, on each type and style of chair produced under contract. are required by the specification to assure continuous quality production. These performance tests include both static load and durability tests. Because of severe time constraints and lack of readily available test equipment only three of the five static load tests and non of the four durability tests were performed. The tests that were perform are covered in Federal Specification AA-C-001771B under the following headings The results from the arm deflection and attachment tests are given in Table 3. Complete overall results from the mechanical tests of each chair specimen are presented in Section 5.1 of this report. 5. INSPECTION RESULTS 5.1 Overall Results The overall inspection and test results for the group of 10 chairs are reserted in tabular form for each of the inspection categories. The Werall results from the visual examination, dimensional examination, aterials evaluation, physical evaluation, and mechanical tests are given Tables 4, 5, 6, 7, and 8 respectively. Defects are given a letter signation of "F" in a specimen column. This indicates failure of that pecimen to comply with the specification section in the corresponding brizontal row. The reasons for the defect ratings for each individual pecimen are detailed in 5.2, Individual Test Results, of this report. 5.2 Individual Test Results The defect report for each specimen is given in Tables 9 to 18. These les identify by section the specific defect which resulted in a nonpliance rating for each specimen. Each defect is classified as "major" iror" per Table III and Sections 4.4.1 and 4.4.2 of Federal pecification AA-C-001771B, whenever possible. Defects not classified in le III are identified as "not listed". Brome term "defect" is applied to "any nonconformance of the unit of fxxt with specified requirements" (per Military Standard 105D - Sampling edures and Tables for Inspection by Attributes) and is consistent with besage of this term in the Federal Specification AA-C-001771B. |