Memorandum - NHTSA

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Iv-37 0 Inner roll stop test (S7.8) - This is a dynamic test using the wheelchair test device, whic:h measures the inner roll stop's ability to keep a wheelchair entirely on the platform surfi ce. Static load tests (S7.9) (S7.11) (S7.14) - There are three static load tests, which test the strength of the lift structure. Static load I requires that the lift be deployed, lowered (loaded), raised (unloaded), lowered (unloaded), raised loaded then stowed. This sequence is referred to partially or in its entirety as a test procedure for several requirements. It also must be repeated after the Static I1 test. The Static I1 test is a pro1If test. When the lift is loaded with three times the standard load for two minutes, it mus not suffer separation, fracture or breakage and must remain operational after the test. Tl'he Static 111 test is the ultimate load test. When the lift is loaded with four times the standard load for two minutes, it must not suffer separation, fracture or breakage. It is not required that the lift be operational after the Static 111test. 0 Fatigue endurance test (S7.10) - This test assures a minimum endurance of working parts by cycling the lift in a fashion that represents normal usage. 0 Handrail test - Assures that handrails will not exhibit breakage or excessive deformaticln when loads similar to those experienced during normal usage are applied. 0 Wheelchair retention device overload test - Tests for a minimum strength of the wheelchair retention device. The test devices specified above can be easily obtained or constructed at a minimum of expen:;e. The majority of the test procedures are from existing standards and therefore most lifts shoulct already be in compliance. In all, 44 specific requirements of FMVSS No. 403 are assessed using the Static Load Test I. Following Static Load Test I ,a Static Load Test I1 (S7.8) is conducted. A static load of 816 k g mass (1,800 lbs.), representing a factor of safety of 3 with respect to lift strength, is applied to the 660 to 686 mm (26" to 27") square pallet through the platform centroid for a period of not les!: than 2 minutes. After this load is removed, a visual inspection is to be conducted per S6.5,
IV-38 Structural Integrity, to identify platform structure, support structure, or mechanism linkage separations, fractures or breakage. The platform lift should still be operable when unloaded ar,d loaded with 272 kg mass (600 lbs.) following this test. Finally, the Static Load I test sequence is repeated a second time per S7.9. <strong>NHTSA</strong> requires a maximum test load of 816 kg mass (1,800 Ibs.) to determine the overall sajety of the lift and its supporting structural members (e.g., hardware used to install the lift in the bu 5 body). The design of a wheelchair lift dictates the space required for installation, and the lift manufacturer has the responsibility to determine compatibility between the bus structural design and the selected lift. The structural interface between the lift and bus body should be capable 4 )f withstanding the application of an 1800 lbs. load to the centroid of the lift platform. <strong>NHTSA</strong>'s requirement is consistent with the Access Board's guidelines. All of the lift equipment currently on the market is expected to be able to meet the 8 16 kg mass (1,800 lbs.) static load requireme nt as well as the second set of component tests without added costs. The FTA specifies the 816 kg mass (1,800 lbs.) static load and requires that the lift should function properly after the test. In addition, the vertical operational range of the lift, the operation of the control system and interlock system, is to be the same as before the Static Lo2 d Test II was conducted. It is believed that all the manufacturer's lift equipment can comply wit 1 the requirements as currently designed, including the second set of component tests.
Page 1 and 2:
Subject: From: To: U.S.Department o
Page 3 and 4: TABLE OF CONTENTS Summary..........
Page 5 and 6: s-2 The annual number of persons in
Page 7 and 8: 11. BACKGROUND 11- 1 Guidelines per
Page 9 and 10: 11-3 and strength; control panel le
Page 11 and 12: 111-2 Generally, there is very litt
Page 13 and 14: 111-4 Table 111-1 Preliminary Natio
Page 15 and 16: 111-6 The NEISS database lacks the
Page 17 and 18: 111-8 Public Transit & Paratransit
Page 19 and 20: w-2 identifying the relevant lift c
Page 21 and 22: IV-4 MEASURE RED FLASHING BEACON OR
Page 23 and 24: IV-6 Acceleration is to be measured
Page 25 and 26: IV-8 FIGURE IV-2 :i a la Y t Permir
Page 27 and 28: IV-10 and vehicle size. This requir
Page 29 and 30: v-12 7. Prepare test block fnction
Page 31 and 32: IV-14 Gaps, Transitions and Opening
Page 33 and 34: Figure m-3 Allowable transition dim
Page 35 and 36: IV-18 sliding or being driven over
Page 37 and 38: v-20 traveling too fast, in the for
Page 39 and 40: WC Retention Overload Test 67.13) I
Page 41 and 42: IV-24 The lift is raised to the flo
Page 43 and 44: N-26 (2 square inches) applicator a
Page 45 and 46: N-28 sufficient to adequately illum
Page 47 and 48: IV-30 lack of follow-up training. N
Page 49 and 50: IV-32 16. Backup Operation (S6.9) -
Page 51 and 52: IV-34 This “looked but did not se
Page 53: W-36 e Clearance test block (S7.1.3
Page 57 and 58: IV-40 NHTSA assumes that the large,
Page 59 and 60: V. BENEFITS v-1 Serious injuries an
Page 61 and 62: v-3 retention strength test, CG and
Page 63 and 64: v-5 objective terms which should le
Page 65 and 66: VI-2 subject to the ADA requirement
Page 67 and 68: VI-4 averaged 35,000 units per year
Page 69 and 70: VI-6 In order to make an estimate o
Page 71 and 72: Cost Estimates VI-8 New Lift Hardwa
Page 73 and 74: VI- 10 close a circuit and send a s
Page 75 and 76: VI-12 FMVSS No. 141 Lift Certificat
Page 77 and 78: VI- 14 Total Cost for Public-Use Li
Page 79 and 80: VII. LEADTIME VII-1 Since the lift-
Page 81 and 82: VIII-2 Table VIII-1 SUMMARY OF SBA
Page 83 and 84: VIII-4 many private transit bus ope
Page 85 and 86: VIII-6 Many hundreds of small busin
Page 87 and 88: VIII-8 adaptive driving equipment f
Page 89 and 90: VIII-10 Facts Book, 7.2 percent of
Page 91 and 92: A- 1 REFERENCES 1. Americans with D
Page 93 and 94: A-3 25. A Directory of UMTA-Funded
Page 95 and 96: Figure 1 Dirgm Showing the Part8 of
Page 97 and 98: 5 Figure 2. Isometric View of Platf
Page 99 and 100: PLATFORM DEFLECTION ANGLE DEFLECTIO
Page 101 and 102: .. Lln UP, OUTER BARRIER UP LIFT MI
Page 103 and 104: i I i I I I I i 1 i I ! j I I ~ __
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Memorandum - NHTSA

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