For CAD dwg and PDF files, scroll down to pattern links in specification table below.

Pattern	Unobstructed
Number/CAD Link	Clear Opening	Dimensions in Inches		Height	Diagonal
Aluminum	O x O1	A x A1	B x B1	C	D
DTD-10AOSG	30 x 48	35 x 48	43 1/2 x 56 1/2	3 1/2	71 5/16
DTD-11AOSG	30 x 54	35 x 54	43 1/2 x 62 1/2	3 1/2	76 1/8
DTD-12AOSG	36 x 48	41 x 48	49 1/2 x 56 1/2	3 1/2	75 1/8
DTD-13AOSG	36 x 60	41 x 60	49 1/2 x 68 1/2	3 1/2	84 1/2
DTD-14AOSG	42 x 48	47 x 48	55 1/2 x 56 1/2	3 1/2	79 3/16
DTD-15AOSG	48 x 48	53 x 48	61 1/2 x 56 1/2	5 1/2	83 1/2
DTD-16AOSG	48 x 54	53 x 54	61 1/2 x 62 1/2	5 1/2	87 11/16
DTD-17AOSG	48 x 72	53 1/2 x 72	62 x 80 1/2	5 1/2	101 5/8
DTD-18AOSG	60 x 60	65 1/2 x 60	74 x 68 1/2	5 1/2	100 13/16
DTD-19AOSG	48 x 60	53 1/2 x 60	62 x 68 1/2	5 1/2	92 3/8
DTD-20AOSG	60 x 72	67 x 72	75 1/2 x 80 1/2	5 1/2	110 3/8

More Information

• H-20 Heavy Duty Aluminum Hatches (PDF)
• Top Mount Style Aluminum Safety Grate System (PDF)
• Pneu-Spring Technology (PDF)
• Top Mount Replacement/Retrofit Hatches (PDF)

Complete list of hatches

• View Images of all Hatch Models »

• Pedestrian Rated 300 PSF, Channel Frame, Weather Tight Access Hatch
  • Model DT-AOSG, Safety Grate »
  • Model DTD-AOSG, Safety Grate (double leaf) »
  • Model CH »
  • Model CHD (double leaf) »
  • Model LDT »
  • Model LDTD (double leaf) »

• Pedestrian Rated 300 PSF, Angle Frame, Non Weather Tight Access Hatch
  • Model LEC-AOSG, Safety Grate »
  • Model LECD-AOSG, Safety Grate (double leaf) »
  • Model LEC »
  • Model LECD (double leaf) »

• Heavy Duty H-20, Channel Frame, Weather Tight Access Hatch
  • Model DT-HD-AOSG, Safety Grate »
  • Model DTD-HD-AOSG, Safety Grate (double leaf) »
  • Model DT-HD »
  • Model DTD-HD (double leaf) »

• Heavy Duty H-20, Angle Frame, Non Weather Tight Access Hatch
  • Model EC-HD-AOSG, Safety Grate »
  • Model ECD-HD-AOSG, Safety Grate (double leaf) »
  • Model EC-HD »
  • Model ECD-HD (double leaf) »

• Hatch Options »