0000920371-99-000004 DEF 14A 1 19981231 19990409 SIMPSON MANUFACTURING CO INC /CA/ 0000920371 3420 943196943 CA 1231 DEF 14A 34 001-13429 99590031 4637 CHABOT DR STE 200 PLEASANTON CA 94588 5106099912 4637 CHABOT DR STE 200 PLEASANTON CA 94588 DEF 14A 1 000092037199000004-001-seq1-def-14a.txt 1999 PROXY