combination shows an upper web 28 and a lower web 29 resting in slots 26 and 27 of spacer lock plate 5 the spacer lock plate 5 in fig1 contains no punched out teeth and therefore is designed to be fastened to the upper and lower chords 2 and 3 by nails or similar pegs which would be driven through the wide or end portions of the flanges also shown in fig1 is a modified upper web 31 with flange as an alternative to spacer lock plate 5 a spacer guide plate 30 also is shown spacer guide plate 30 in essence replaces the stem portion 9 of the spacer lock plate 5 and is further illustrated in fig1 which is a sectional view taken along line 11 11 of fig1 fig1 shows a modified spacer guide plate containing h clamps 32 rather than teeth for extending into the upper and lower chords slot 33 is designed to mutually engage a corresponding slot in the web 4 fig1 which is a perspective of a modified construction member illustrates how the spacer guide plate 30 is locked in place by a lock plate 34 and an opposing lock plate 39 also shown in fig1 are upper and lower chords having grooves 35 into which the web 4 extends this configuration provides additional rigidity and strength to the construction member the lock plate 34 is better shown in fig1 and 15.