---
kind: "section"
citation: "49 C.F.R. § 587.14"
title: "49"
number: "587.14"
heading: "Deformable face component dimensions and material specifications."
url: "https://uscodex.org/cfr/49/587.14"
---

# §587.14. Deformable face component dimensions and material specifications.


The dimensions of the deformable face are illustrated in Figure 1 of this subpart. The dimensions and materials of the individual components are listed separately below. All dimensions allow a tolerance of ±2.5 mm (0.1 in) unless otherwise specified.

- (a) **Main honeycomb block.**
  - (1) **Dimensions.** The main honeycomb block has a height of 650 mm (25.6 in) (in the direction of honeycomb ribbon axis), a width of 1,000 mm (39.4 in), and a depth of 450 mm (17.7 in)(in the direction of honeycomb cell axis).
  - (2) **Material.** The main honeycomb block is constructed of the following material. The honeycomb is manufactured out of aluminum 3003, with a foil thickness of 0.076 mm (0.003 in) ±0.004 mm (0.002 in) a cell size of 19.14 mm (0.75 in), a density of 28.6 kg/m 3 (1.78 lb/ft 3) ±2kg/m 3 (0.25 1b/ft 3), and a crush strength of 0.342 MPa (49.6 psi) + 0%−10%, measured in accordance with the certification procedure described in [§ 587.15](/cfr/49/587.15.md).
- (b) **Bumper element honeycomb.**
  - (1) **Dimensions.** The bumper element honeycomb has a height of 330 mm (13 in)(in the direction of honeycomb ribbon axis), a width of 1,000 mm (39.4 in), and a depth of 90 mm (3.5 in) (in the direction of honeycomb cell axis).
  - (2) **Material.** The bumper element honeycomb is constructed of the following material. The honeycomb is manufactured out of aluminum 3003, with a foil thickness of 0.076 mm (0.003 in) ±0.004 mm (0.0002 in), a cell size of 6.4 mm (0.25 in) ±1 mm (0.040 in), a density of 82.6 kg/m 3 (5.15 lb/ft 3) ±3 kg/m 3 (0.19 lb/ft 3), and a crush strength of 1.711 MPa (248 psi) + 0% −10%, measured in accordance with the certification procedure described in § 587.14.
- (c) **Backing sheet.**
  - (1) **Dimensions.** The backing sheet has a height of 800 mm (31.5 in), a width of 1,000 mm (39.4 in), and a thickness of 2.0 mm (0.08 in) ±0.1 mm (0.004 in).
  - (2) **Material.** The backing sheet is manufactured out of aluminum 5251/5052.
- (d) **Cladding sheet.**
  - (1) **Dimensions.** The cladding sheet of the main honeycomb block has a total length of 1,700 mm (66.9 in), a width of 1,000 mm (39.4 in), and a thickness of 0.81 mm (0.03 in) ±0.07 mm (0.003 in). It is shaped as indicated in Figure 1.
  - (2) **Material.** The cladding sheet of the main honeycomb block is manufactured out of aluminum 5251/5052.
- (e) **Bumper element honeycomb facing sheet.**
  - (1) **Dimensions.** The bumper facing sheet has a height of 330 mm (13 in), a width of 1,000 mm (39.4 in), and a thickness of 0.81 mm (0.03 in) ±0.07 mm (0.003 in).
  - (2) **Material.** The bumper element honeycomb facing sheet is manufactured out of aluminum 5251/5052.
- (f) **Adhesive.** The adhesive used throughout is a two-part polyurethane. (such as Ciba-Geigy XB5090/1 resin with XB5304 hardener, or equivalent).

## Notes

### Source

Source: 65 FR 17199, Mar. 31, 2000, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 322, 30111, 30115, 30117, and 30166; delegation of authority at 49 CFR 1.50.

### Source

Source: 55 FR 45779, Oct. 30, 1990, unless otherwise noted.