High-load fastener packs for use with the magazines of fastener driving tools

A fastener driving tool having a body with a forward portion, a reciprocating driver within said body forward portion, means to actuate said driver, a guide body mounted beneath said body forward portion having a drive track for said driver, an elongated fastener magazine having a forward end affixed to said guide body and having a fastener guiding channel leading to said drive track, and means associated with said tool to urge and advance fasteners within said magazine to said drive track, said magazine comprising first and second sides in parallel spaced relationship connected along their bottom edges to form a U-shaped cross section constituting said fastener guiding channel, said first magazine side having an opening formed therein leading to said channel, said opening extending partway into said tool body, a high-load fastener pack comprising a box-like structure, a plurality of fasteners in said pack, said fasteners being arranged in strips in side-by-side relationship, each strip comprising a tandem row of fasteners and means to temporarily join them together, means to releasably affix said pack to said tool in communication with said opening and said magazine channel, said pack having an opening leading to said magazine channel, and means within said pack to urge said fastener strips laterally toward said magazine.