beam in the direction parallel to the corrugations fig8 shows the fiber orientation in the chords i e all fibers running lengthwise of the chord 0 u00b0 orientation because the chords are loaded almost entirely in tension and compression in the lengthwise direction fig9 semi schematically illustrates a beam assembly including two web and flange parts and a chord member and capstrip held in the tooling which forms the webs and flanges for bonding into an integrated beam a block 31 positions the capstrip positively for adequate dimensional control elastomeric pads 32 are positioned between a pair of form blocks 33 and 34 so that when force is applied to blocks 33 and 34 the pads 32 distribute the resistive pressure evenly on the web and flanges while accommodating minor dimensional irregularities the beam and tooling are illustrated in section at a point which reveals one of the pockets 25 which may be left empty or filled with plastic for added strength and stiffness as desired fig1 illustrates an embodiment of the invention in which the flanges 14 39 15 39 and chords and capstrips not shown are curved and not parallel as in fabricating a section of a rib of an airplane wing in accordance with another example of.