Does this have an osha rating?

yes for safety follow the safety they show

Does the platform move? Can you buy a piece for the top?

The platform height can be adjusted up and down. This scaffolding can be added to.

Are the platform braces single pin or double pin? Metaltech has double pin, but I'm seeing people getting single pin. What's the deal?

Double pins for the two main supports. Single pins are used for additional safety. You grip the spring handles and that disengages the double pins. Single pins are used to attach wheels and outriggers and to secure a second set if you stack them.

Material	Alloy Steel
Brand	Metaltech
Colour	yellow
Special Feature	Foldable
Item Weight	126 Pounds
Maximum Height	73 Inches
Manufacturer	Metaltech
UPC	778300000074 778300200108
Global Trade Identification Number	00778300200108
Item model number	I-CISC
Product Dimensions	189.99 x 187.96 x 75.69 cm; 57.15 kg
ASIN	B003XQYQVC

Metaltech I-CISC Multipurpose 6'. Baker-Style Scaffold-1, 000-Lb. Capacity, Steel, Model#, 1

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