| 摘要 |
<p>A guide for cutting a truss joist I-beam with a hand-held power saw such as a worm drive, hypoid drive, or circular saw is disclosed. The guide comprises a base positionable along a top surface and an inner edge of one chord of the I-beam, a mechanism mounted on the base for securely holding the base to the chord, and a cutting guide pivotally mounted on the base for guiding a hand-held power saw at a selected angle in cutting the I-beam. The holding mechanism includes a handle extending from the base and a pivot arm pivotally coupled to the base. The pivot arm has a gripping and for contacting the chord and a pivot handle for pulling upwardly toward the handle for causing the gripping end to pivot into contact with the chord. The cutting guide comprises a face plate having a flat bottom surface for bridging and resting upon the tops of the chords of the I-beam and a flat front surface generally perpendicular to the bottom surface of the face plate for guiding a side support edge of a hand-held power saw when cutting the I-beam, a shoe support mounted on and extending forwardly from the bridge plate having a flat top surface coplanar with the bottom surface of the bridge plate for guiding a lower support edge of the hand-held power saw, and a mechanism for setting the saw guide for cutting the I-beam at a selected angle.</p> |
